criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include <iostream>
#include <algorithm>
#include <cmath>
#include <limits>
#include <vector>
#define MAX 100000000
using namespace std;
 
string di[4]={"dream","dreamer","erase", "eraser"};
 
int main (void) {
  string S;
  cin >> S;
  reverse(S.begin(), S.end());
  for (int i=0; i<=3; i++){
    reverse(di[i].begin(), di[i].end());
  }
  bool can = true;
  for (int i=0; i<S.size();){
    bool can2 =false;
    for (int j=0; j<=3; j++){
      string d=di[j];
      if (d==S.substr(i,d.size())){
        can2 =true;
        i=i+d.size();
      }
    }
    if (!can2){
      can =false;
      break;
  }
  if (can) cout << "Yes";
  else cout << "No;"
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:21: error: expected ';' before '}' token
   33 |   else cout << "No;"
      |                     ^
      |                     ;
   34 | }
      | ~                    
a.cc:34:2: error: expected '}' at end of input
   34 | }
      |  ^
a.cc:11:17: note: to match this '{'
   11 | int main (void) {
      |                 ^
Language: C++

#include <iostream>
#include <algorithm>
#include <cmath>
#include <limits>
#include <vector>
#define MAX 100000000
using namespace std;

string di[4]={"dream","dreamer","erase", "eraser"};

int main (void) {
  string S;
  cin >> S;
  reverse(S.begin(), S.end());
  for (int i=0; i<=3; i++){
    reverse(di[i].begin(), di[i].end());
  }
  bool can = true;
  for (int i=0; i<=S.size();){
    bool can2 =false;
    for (int j=0; j<=3; j++){
      string d=di[j];
      if (d==S.substr(i,d.size())){
        can2 =true;
        i=i+d.size();
      }
    }
    if (!can2){
      can =false;
      break;
  }
  if (can) cout << "Yes";
  else cout << "No;"
}

Compiler output:
a.cc: In function 'int main()':
a.cc:33:21: error: expected ';' before '}' token
   33 |   else cout << "No;"
      |                     ^
      |                     ;
   34 | }
      | ~                    
a.cc:34:2: error: expected '}' at end of input
   34 | }
      |  ^
a.cc:11:17: note: to match this '{'
   11 | int main (void) {
      |                 ^
Language: C++

#include <iostream>
#include <algorithm>
#include <cmath>
#include <limits>
#include <vector>
#define MAX 100000000
using namespace std;

string di[4]=["dream","dreamer","erase", "eraser"];

int main (void) {
  string S;
  cin >> S;
  reverse(S.begin(), S.end());
  for (int i=0; i<=3; i++){
    reverse(di[i].begin(), di[i].end());
  }
  bool can1= true;
  for (int i=0; i<=S.size();){
    bool can2 =false;
    for (int j=0; j<=3; j++){
      if (di[j]==S.substr(i,di[j].size())){
        i=i+di[j].size();
        can2 =true;
      }
    }
    if (!can2){
      cout << "No";
      retunr 0;
    }
  }
  cout << "Yes";
}

Compiler output:
a.cc:9:15: error: expected identifier before string constant
    9 | string di[4]=["dream","dreamer","erase", "eraser"];
      |               ^~~~~~~
a.cc:9:22: error: expected ']' before ',' token
    9 | string di[4]=["dream","dreamer","erase", "eraser"];
      |                      ^
      |                      ]
a.cc: In lambda function:
a.cc:9:22: error: expected '{' before ',' token
a.cc: At global scope:
a.cc:9:14: error: array must be initialized with a brace-enclosed initializer
    9 | string di[4]=["dream","dreamer","erase", "eraser"];
      |              ^~~~~~~~
a.cc:9:23: error: expected unqualified-id before string constant
    9 | string di[4]=["dream","dreamer","erase", "eraser"];
      |                       ^~~~~~~~~
a.cc: In function 'int main()':
a.cc:29:7: error: 'retunr' was not declared in this scope
   29 |       retunr 0;
      |       ^~~~~~
Language: C++

#include <algorithm>
#include <array>
#include <bitset>
#include <functional>
#include <iostream>
#include <memory>
#include <set>
#include <string>
#include <vector>

using namespace std;

int main() {
	string s;
	cin >> s;
	bool ok = true;
	for (int i = s.length() - 1; i >= 0; i--) {
		switch (s[i]) {
		case 'm': // "dream"
			if (i >= 4 && strncmp(&s[i - 4], "dream", 5) == 0) {
				i -= 4;
				continue;
			}
			break;
		case 'r': // "dreamer", "eraser"
			if (i >= 6 && strncmp(&s[i - 6], "dreamer", 7) == 0) {
				i -= 6;
				continue;
			}
			if (i >= 5 && strncmp(&s[i - 5], "eraser", 6) == 0) {
				i -= 5;
				continue;
			}
			break;
		case 'e': // "erase"
			if (i >= 4 && strncmp(&s[i - 4], "erase", 5) == 0) {
				i -= 4;
				continue;
			}
			break;
		default:
			break;
		}
		ok = false;
		break;
	}
END:
	cout << (ok ? "YES" : "NO") << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:39: error: 'strncmp' was not declared in this scope
   20 |                         if (i >= 4 && strncmp(&s[i - 4], "dream", 5) == 0) {
      |                                       ^~~~~~~
a.cc:8:1: note: 'strncmp' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    7 | #include <set>
  +++ |+#include <cstring>
    8 | #include <string>
a.cc:26:39: error: 'strncmp' was not declared in this scope
   26 |                         if (i >= 6 && strncmp(&s[i - 6], "dreamer", 7) == 0) {
      |                                       ^~~~~~~
a.cc:26:39: note: 'strncmp' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
a.cc:30:39: error: 'strncmp' was not declared in this scope
   30 |                         if (i >= 5 && strncmp(&s[i - 5], "eraser", 6) == 0) {
      |                                       ^~~~~~~
a.cc:30:39: note: 'strncmp' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
a.cc:36:39: error: 'strncmp' was not declared in this scope
   36 |                         if (i >= 4 && strncmp(&s[i - 4], "erase", 5) == 0) {
      |                                       ^~~~~~~
a.cc:36:39: note: 'strncmp' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
Language: C++

#include <stdio.h>
#include <string>

using namespace std;

int main() {

    char S[100001];
    scanf("%s", S);
    int end = (int)strlen(S);
    end--; // zero origin

    bool match = false;
    while (true) {
        if (end == -1) {
            match = true;
            break;
        }

        char c = S[end];
        if (c != 'r') {
            char dream1 = S[end - 4];
            char dream2 = S[end - 3];
            char dream3 = S[end - 2];
            char dream4 = S[end - 1];
            char dream5 = S[end];
            if (dream1 == 'd'
                && dream2 == 'r'
                && dream3 == 'e'
                && dream4 == 'a'
                && dream5 == 'm') {
                end -= 5;
                continue;
            }

            char erase1 = S[end - 4];
            char erase2 = S[end - 3];
            char erase3 = S[end - 2];
            char erase4 = S[end - 1];
            char erase5 = S[end];
            if (erase1 == 'e'
                && erase2 == 'r'
                && erase3 == 'a'
                && erase4 == 's'
                && erase5 == 'e') {
                end -= 5;
                continue;
            } else {
                break;
            }
        } else {
            c = S[end - 1];
            if (c == 'e') {
                char dreamer1 = S[end - 6];
                char dreamer2 = S[end - 5];
                char dreamer3 = S[end - 4];
                char dreamer4 = S[end - 3];
                char dreamer5 = S[end - 2];
                char dreamer6 = S[end - 1];
                char dreamer7 = S[end];
                if (dreamer1 == 'd'
                    && dreamer2 == 'r'
                    && dreamer3 == 'e'
                    && dreamer4 == 'a'
                    && dreamer5 == 'm'
                    && dreamer6 == 'e'
                    && dreamer7 == 'r') {
                    end -= 7;
                    continue;
                }

                char eraser1 = S[end - 5];
                char eraser2 = S[end - 4];
                char eraser3 = S[end - 3];
                char eraser4 = S[end - 2];
                char eraser5 = S[end - 1];
                char eraser6 = S[end];
                if (eraser1 == 'e'
                    && eraser2 == 'r'
                    && eraser3 == 'a'
                    && eraser4 == 's'
                    && eraser5 == 'e'
                    && eraser6 == 'r') {
                    end -= 6;
                    continue;
                } else {
                    break;
                }
            } else {
                break;
            }
        }
    }

    if (match) {
        printf("YES\n");
    } else {
        printf("NO\n");
    }

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:20: error: 'strlen' was not declared in this scope
   10 |     int end = (int)strlen(S);
      |                    ^~~~~~
a.cc:3:1: note: 'strlen' is defined in header '<cstring>'; this is probably fixable by adding '#include <cstring>'
    2 | #include <string>
  +++ |+#include <cstring>
    3 |
Language: C++

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

int main(){
	string devide[4] = {"dream", "dreamer", "erase", "eraser"};
	string S;
	cin >> S;
	reverse(S.begin(), S.end());
	for(int i=0; i<4; ++i) reverese(devide[i].begin(), devide[i].end());

	bool flag = true;
	for(int i=0; i<S.size();){
		bool flag2 = false;
		for(int j=0; j<4; ++j){
			string d = devide[j]
			if(S.substr(i, d.size())==d){
				flag2 = true;
				i += d.size();
			}
			if (!flag2){
				flag = false;
				break;
			}
		}
	}
	if (flag){
		cout<<"YES"<<endl;
	}else{
		cout<<"NO"<<endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:32: error: 'reverese' was not declared in this scope
   11 |         for(int i=0; i<4; ++i) reverese(devide[i].begin(), devide[i].end());
      |                                ^~~~~~~~
a.cc:18:25: error: expected ',' or ';' before 'if'
   18 |                         if(S.substr(i, d.size())==d){
      |                         ^~
Language: C++

import strutils
import sequtils
import algorithm
import unicode

var s = readLine(stdin)
var str = @["dream","dreamer","erase","erase"]

s = s.reversed
str = str.map(reversed)

while s != "":
    var update = false
    for now in str:
        if s.len < now.len:
            continue
        elif s.substr(0,now.len - 1) == now:
            s = s.substr(now.len,s.len - 1)
            update = true
    if update == false:
        break
if s == "":
    echo "YES"
else:
    echo "NO"

Compiler output:
a.cc:7:11: error: stray '@' in program
    7 | var str = @["dream","dreamer","erase","erase"]
      |           ^
a.cc:1:1: error: 'import' does not name a type
    1 | import strutils
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: Java

import java.util.Scanner;

public class Daydream {

	public static void main(String[] args) {
		String divide[] = { "dream", "dreamer", "erase", "eraser" };
		Scanner sc = new Scanner(System.in);
		String s = sc.next();

		//すべての文字列を左右反転
		StringBuffer sb = new StringBuffer(s);
		s = sb.reverse().toString();
//		System.out.println(s);
		for (int i = 0; i < 4; i++) {
			sb = new StringBuffer(divide[i]);
			divide[i] = sb.reverse().toString();
//			System.out.println(divide[i]);
		}

		//端から切っていく
		boolean flg = true;
		for (int i = 0; i < s.length();) {
			boolean flg2 = false;//4この文字のうち、どれかでdevide出来るか判定
			for (int j = 0; j < 4; j++) {
				String d = divide[j];
				System.out.println(s.substring(i, d.length()));
				if (s.substring(i, d.length()).equals(d)) {//dでdivide出来るか
					flg2 = true;
					i += d.length();//divide出来たらiを進める
				}
			}
			if (!flg2) {//divide出来なかったら
				flg = false;
				break;
			}
		}

		if (flg) {
			System.out.println("YES");
		} else {
			System.out.println("NO");
		}

	}

}


Compiler output:
Main.java:3: error: class Daydream is public, should be declared in a file named Daydream.java
public class Daydream {
       ^
1 error
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;


int main(){
    
    string divide[4] = {"dream","dreamer","erase","eraser"}

    string s;
    cin >> s;

    revers(s.begin(),s.end());
    for(int i = 0; i <= 4; i++) revers(divide(i).begin(),divide(i).end());

    bool can = true;
    for(int i = 0; i < s.size();){
        bool can2 = false;
        for(int j = 0; j < 4; j++){
            string d = divide[j];
            if(d == s.substr(i,d.size()){
                can2 = true;
                i += d.size();
            }
        }
        if(!can2){ 
            can = false;
            break;
        }    
    }

    if(can) cout<<"YES\n";
    else cout <<"NO\n";

}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: expected ',' or ';' before 'string'
   11 |     string s;
      |     ^~~~~~
a.cc:12:12: error: 's' was not declared in this scope
   12 |     cin >> s;
      |            ^
a.cc:14:5: error: 'revers' was not declared in this scope
   14 |     revers(s.begin(),s.end());
      |     ^~~~~~
a.cc:15:46: error: 'divide' cannot be used as a function
   15 |     for(int i = 0; i <= 4; i++) revers(divide(i).begin(),divide(i).end());
      |                                        ~~~~~~^~~
a.cc:15:64: error: 'divide' cannot be used as a function
   15 |     for(int i = 0; i <= 4; i++) revers(divide(i).begin(),divide(i).end());
      |                                                          ~~~~~~^~~
a.cc:22:41: error: expected ')' before '{' token
   22 |             if(d == s.substr(i,d.size()){
      |               ~                         ^
      |                                         )
a.cc:26:9: error: expected primary-expression before '}' token
   26 |         }
      |         ^
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
using namespace std;


int main(){
    
    divide = {"dream","dreamer","erase","eraser"}

    string s;
    cin >> s;

    revers(s.begin(),s.end());
    for(int i = 0; i <= 4; i++) revers(divide(i).begin(),divide(i).end());

    bool can = true;
    for(int i = 0; i < s.size();){
        bool can2 = false;
        for(int j = 0; j < 4; j++){
            string d = divide[j];
            if(d == str.substr(i,d.size()){
                can2 = true;
                i += d.size();
            }
        }
        if(!can2){ 
            can = false;
            break;
        }    
    }

    if(can) cout<<"Yes\n";
    else cout <<"No\n";

}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'divide' was not declared in this scope
    9 |     divide = {"dream","dreamer","erase","eraser"}
      |     ^~~~~~
a.cc:12:12: error: 's' was not declared in this scope
   12 |     cin >> s;
      |            ^
a.cc:14:5: error: 'revers' was not declared in this scope
   14 |     revers(s.begin(),s.end());
      |     ^~~~~~
a.cc:22:21: error: 'str' was not declared in this scope; did you mean 'std'?
   22 |             if(d == str.substr(i,d.size()){
      |                     ^~~
      |                     std
a.cc:22:43: error: expected ')' before '{' token
   22 |             if(d == str.substr(i,d.size()){
      |               ~                           ^
      |                                           )
a.cc:26:9: error: expected primary-expression before '}' token
   26 |         }
      |         ^
Language: C

#include <stdio.h>
#include <string.h>
int main() {
	int i;
	char s[100010];
	scanf("%s", s);
	i = strlen(s) - 1;
	for (i >= 0)
	{
		if (s[i - 4] == 'd' && s[i - 3] == 'r' && s[i - 2] == 'e' && s[i - 1] == 'a' && s[i] == 'm') {
			i -= 5;
		}
		if (s[i - 6] == 'd' && s[i - 5] == 'r' && s[i - 4] == 'e' && s[i -3] == 'a' && s[i- 2] == 'm' && s[i - 1] == 'e' && s[i] == 'r') {
			i -= 7;
		}
		else if (s[i - 4] == 'e' && s[i - 3] == 'r' && s[i - 2] == 'a' && s[i - 1] == 's' && s[i] == 'e') {
			i -= 5;
		}
		else if(s[i - 5] == 'e' && s[i - 4] == 'r' && s[i - 3] == 'a' && s[i - 2] == 's' && s[i - 1] == 'e' && s[i] == 'r'){
			i -= 6;
		}
		else
		{
			printf("NO\n");
			return 0;
		}
	}
	printf("YES\n");
	return 0;
}


Compiler output:
main.c: In function 'main':
main.c:8:20: error: expected ';' before ')' token
    8 |         for (i >= 0)
      |                    ^
      |                    ;
main.c:8:20: error: expected expression before ')' token
Language: C

#include <stdio.h>
#include <string.h>
int main() {
	int len;
	char s[100010];
	scanf("%s", s);
	i = strlen(s) - 1;
	for (i >= 0)
	{
		if (s[i - 4] == 'd' && s[i - 3] == 'r' && s[i - 2] == 'e' && s[i - 1] == 'a' && s[i] == 'm') {
			i -= 5;
		}
		if (s[i - 6] == 'd' && s[i - 5] == 'r' && s[i - 4] == 'e' && s[i -3] == 'a' && s[i- 2] == 'm' && s[i - 1] == 'e' && s[i] == 'r') {
			i -= 7;
		}
		else if (s[i - 4] == 'e' && s[i - 3] == 'r' && s[i - 2] == 'a' && s[i - 1] == 's' && s[i] == 'e') {
			i -= 5;
		}
		else if(s[i - 5] == 'e' && s[i - 4] == 'r' && s[i - 3] == 'a' && s[i - 2] == 's' && s[i - 1] == 'e' && s[i] == 'r'){
			i -= 6;
		}
		else
		{
			printf("NO\n");
			return 0;
		}
	}
	printf("YES\n");
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:9: error: 'i' undeclared (first use in this function)
    7 |         i = strlen(s) - 1;
      |         ^
main.c:7:9: note: each undeclared identifier is reported only once for each function it appears in
main.c:8:20: error: expected ';' before ')' token
    8 |         for (i >= 0)
      |                    ^
      |                    ;
main.c:8:20: error: expected expression before ')' token
Language: C++

def main():
    S = input()

    s = len(S)
    while s > 4:
        e = s
        for i in (5, 6, 7):
            s = e - i
            if S[s:e] in ('dream', 'dreamer', 'erase', 'eraser'):
                break
        else:
            print('NO')
            return
    print('YES')

main()


Compiler output:
a.cc:9:27: warning: multi-character literal with 5 characters exceeds 'int' size of 4 bytes
    9 |             if S[s:e] in ('dream', 'dreamer', 'erase', 'eraser'):
      |                           ^~~~~~~
a.cc:9:36: warning: multi-character literal with 7 characters exceeds 'int' size of 4 bytes
    9 |             if S[s:e] in ('dream', 'dreamer', 'erase', 'eraser'):
      |                                    ^~~~~~~~~
a.cc:9:47: warning: multi-character literal with 5 characters exceeds 'int' size of 4 bytes
    9 |             if S[s:e] in ('dream', 'dreamer', 'erase', 'eraser'):
      |                                               ^~~~~~~
a.cc:9:56: warning: multi-character literal with 6 characters exceeds 'int' size of 4 bytes
    9 |             if S[s:e] in ('dream', 'dreamer', 'erase', 'eraser'):
      |                                                        ^~~~~~~~
a.cc:12:19: warning: multi-character character constant [-Wmultichar]
   12 |             print('NO')
      |                   ^~~~
a.cc:14:11: warning: multi-character character constant [-Wmultichar]
   14 |     print('YES')
      |           ^~~~~
a.cc:1:1: error: 'def' does not name a type
    1 | def main():
      | ^~~
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;
string s;
string divide[4] = { "dream", "dreamer", "erase", "eraser" };
int main() {
	cin >> s;
	reverse(s.begin(), s.end());
	for (int i = 0; i < 4; ++i) reverse(divide[i].begin(), divide[i].end());

	bool flag = true;
	for (int i = 0; i < s.size();) {
		bool flag2 = false;
		for (int j = 0; j < 4; ++j) {
			string str = divide[i];
			if (s.substr(i, str.size()) == str) {
				flag2 = true;
				i += str.size());
			}
		}
		if (!flag2) {
			flag = false;
			break;
		}
	}
	if (flag) cout << "YES" << endl;
	else cout << "NO" << endl;
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:48: error: expected ';' before ')' token
   20 |                                 i += str.size());
      |                                                ^
      |                                                ;
Language: C++

//#include <bits/stdc++.h>
#include<iostream>
#include<string>
#include<queue>
#include<vector>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)//初期値a,i<bの範囲でループ
#define REP(i,n) FOR(i,0,n)//初期値0,i<nの範囲でループ
using namespace std;
typedef long long ll;//int64
typedef unsigned long long ull;



int main(){
    string s;
    cin>>s;

    for(;;){
        if(s.size()==0)break;
        string s5,s6;
        s5=s.substr(s.size()-5,5);
        s6=s.substr(s.size()-6,6);
        s7=s.substr(s.size()-7,7);

        if(s6=="eraser"){
            s=s.substr(0,s.size()-6);
        }else if(s5=="erase"){
            s=s.substr(0,s.size()-5);
        }else if(s7=="dreamer"){
            s=s.substr(0,s.size()-7);
        }else if(s5=="dream"){
            s=s.substr(0,s.size()-5);
        }else{
            cout<<"NO";
            return 0;
        }


    }
    cout<<"YES";
    

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:9: error: 's7' was not declared in this scope; did you mean 's6'?
   23 |         s7=s.substr(s.size()-7,7);
      |         ^~
      |         s6
Language: C++

//#include <bits/stdc++.h>
#include<iostream>
#include<string>
#include<queue>
#include<vector>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)//初期値a,i<bの範囲でループ
#define REP(i,n) FOR(i,0,n)//初期値0,i<nの範囲でループ
using namespace std;
typedef long long ll;//int64
typedef unsigned long long ull;



int main(){
    string s;
    cin>>s;

    for(;;){
        if(s.size()==0)break;
        string s5,s6;
        s5=s.substr(s.size()-5,5);
        s6=s.substr(s.size()-6,6);
        s7=s.substr(s.size()-7,7;

        if(s6=="eraser"){
            s=s.substr(0,s.size()-6);
        }else if(s5=="erase"){
            s=s.substr(0,s.size()-5);
        }else if(s7=="dreamer"){
            s=s.substr(0,s.size()-7);
        }else if(s5=="dream"){
            s=s.substr(0,s.size()-5);
        }else{
            cout<<"NO";
            return 0;
        }


    }
    cout<<"YES";
    

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:9: error: 's7' was not declared in this scope; did you mean 's6'?
   23 |         s7=s.substr(s.size()-7,7;
      |         ^~
      |         s6
a.cc:23:33: error: expected ')' before ';' token
   23 |         s7=s.substr(s.size()-7,7;
      |                    ~            ^
      |                                 )
Language: C++

//#include <bits/stdc++.h>
#include<iostream>
#include<string>
#include<queue>
#include<vector>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)//初期値a,i<bの範囲でループ
#define REP(i,n) FOR(i,0,n)//初期値0,i<nの範囲でループ
using namespace std;
typedef long long ll;//int64
typedef unsigned long long ull;



int main(){
    string s;
    cin>>s;

    for(;;){
        if(s.size()==0)break;
        string s5,s6;
        s5=s.substr(s.size()-5,5);
        s6=s.substr(s.size()-6,6);
        s7=s.substr(s.size()-7,7;

        if(s6=="eraser"){
            s=substr(0,s.size()-6);
        }else if(s5=="erase"){
            s=substr(0,s.size()-5);
        }else if(s7=="dreamer"){
            s=substr(0,s.size()-7);
        }else if(s5=="dream"){
            s=s.substr(0,s.size()-5);
        }else{
            cout<<"NO";
            return 0;
        }


    }
    cout<<"YES";
    

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:9: error: 's7' was not declared in this scope; did you mean 's6'?
   23 |         s7=s.substr(s.size()-7,7;
      |         ^~
      |         s6
a.cc:23:33: error: expected ')' before ';' token
   23 |         s7=s.substr(s.size()-7,7;
      |                    ~            ^
      |                                 )
a.cc:26:15: error: 'substr' was not declared in this scope
   26 |             s=substr(0,s.size()-6);
      |               ^~~~~~
a.cc:28:15: error: 'substr' was not declared in this scope
   28 |             s=substr(0,s.size()-5);
      |               ^~~~~~
a.cc:30:15: error: 'substr' was not declared in this scope
   30 |             s=substr(0,s.size()-7);
      |               ^~~~~~
Language: C++

#include <algorithm>
#include <cctype>
#include <complex>
#include <iomanip>
#include <iostream>
#include <queue>
#include <regex>
#include <set>
#include <string>
#include <vector>
#include <cstring>

using std::cin;
using std::cout;
using std::endl;

using std::string;
using std::to_string;
using std::vector;
using std::set;
using std::queue;
using std::priority_queue;

using std::min;
using std::max;
using std::sort;
using std::abs;

int main() {
    string s;
    cin >> s;

    bool possible = true;
    bool er_flag = false;
    size_t i = 0;
    while (i < s.length()) {
        if(s.substr(i, 5) == "dream"){
            i += 5;
            er_flag = true;
        }
        else if(s.substr(i, 5) == "erase"){
            i += 5;
            er_flag = true;
        }
        else if(s.substr(i, 2) == "er"){
            i += 2;
            er_flag = false;
        }
        else{
            possible = false;
            break;
        }
    }

    cout << (ans ? "YES" : "NO") << endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:55:14: error: 'ans' was not declared in this scope; did you mean 'abs'?
   55 |     cout << (ans ? "YES" : "NO") << endl;
      |              ^~~
      |              abs
Language: C++

#include <iostream>
#include <string>


using namespace std;

int main()
{
	string s;
	cin >> s;
	reverse(s.begin(), s.end());
	for (int i = 0; i < s.size(); i++) {

		if (s.substr(0, 7) == "remaerd") s = s.substr(7, s.size() - 7);
		else if (s.substr(0, 6) == "resare") s = s.substr(6, s.size() - 6);
		else if (s.substr(0, 5) == "maerd") s = s.substr(5, s.size() - 5);
		else if (s.substr(0, 5) == "esare") s = s.substr(5, s.size() - 5);
		else {
			cout << "NO" << endl;
			return 0;
		}
		if (s.size() == 0) {
			cout << "YES" << endl;
			return 0;
		}
}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:9: error: 'reverse' was not declared in this scope
   11 |         reverse(s.begin(), s.end());
      |         ^~~~~~~
Language: C++

#include <iostream>
#include<sstream>
#include<vector>
#include<iterator>
using namespace std;

int main(void)
{
	string S;
	cin >> S;

	string str(S);
	reverse(str.begin(), str.end());
	string operation[4] = {"dreamer", "dream", "eraser", "erase"};
	for(int i=0; i<4; i++)
		reverse(operation[i].begin(), operation[i].end());

	auto it = str.begin();
	while(it != str.end())
	{
		bool ok = false;
		for(int i=0; i<4; i++)
		{
			if(str.substr(it-str.begin(), operation[i].size()) == operation[i])
			{
				it += operation[i].size();
				ok = true;
				break;
			}
		}

		if(ok != true)
			break;
	}
			
	string ret;
	if(it == str.end())
		ret = "YES";
	else
		ret = "NO";

	cout << ret << endl;

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'reverse' was not declared in this scope
   13 |         reverse(str.begin(), str.end());
      |         ^~~~~~~
Language: C++

#include <bits/stdc++.h>

char str[110000];
std::regex pattern ("(erase|eraser|dream|dreamer)*");

int main () {
	gets (str);
	if (std::regex_match (str, pattern))
		puts ("YES");
	else
		puts ("NO");
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'gets' was not declared in this scope; did you mean 'getw'?
    7 |         gets (str);
      |         ^~~~
      |         getw
Language: Java

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    String inverse = "";
    for(int i = S.length() - 1; i >= 0; i--) {
      inverse += String.valueOf(S.charAt(i));
    }
    String s1 = "maerd";
    String s2 = "remaerd";
    String s3 = "esare";
    String s4 = "resare";
    String ans = "YES";
    int pos = 0;
    while(pos < S.length()) {
      String str5;
      String str6;
      String str7;
      char c = inverse.charAt(pos);
      if(pos + 5 <= S.length()) {
        str5 = inverse.substring(pos, pos + 5);
      }
      if(pos + 6 <= S.length()) {
        str6 = inverse.substring(pos, pos + 6);
      }
      if(pos + 7 <= S.length()) {
        str7 = inverse.substring(pos, pos + 7);
      }
      if((pos + 5 <= S.length()) && (s1.equals(str5))) {
        pos += 5;
      } else if((pos + 7 <= S.length()) && (s2.equals(str7))) {
        pos += 7;
      } else if((pos + 5 <= S.length()) && (s3.equals(str5))) {
        pos += 5;
      } else if((pos + 6 <= S.length()) && (s4.equals(str6))) {
        pos += 6;
      } else {
        ans = "NO";
        break;
      }
    }
    System.out.println(ans);
  }
}


Compiler output:
Main.java:31: error: variable str5 might not have been initialized
      if((pos + 5 <= S.length()) && (s1.equals(str5))) {
                                               ^
Main.java:33: error: variable str7 might not have been initialized
      } else if((pos + 7 <= S.length()) && (s2.equals(str7))) {
                                                      ^
Main.java:35: error: variable str5 might not have been initialized
      } else if((pos + 5 <= S.length()) && (s3.equals(str5))) {
                                                      ^
Main.java:37: error: variable str6 might not have been initialized
      } else if((pos + 6 <= S.length()) && (s4.equals(str6))) {
                                                      ^
4 errors
Language: C

import java.util.*;
 
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    String inverse = "";
    int l=S.length();
    for(int i = l - 1; i >= 0; i--) {
      inverse += String.valueOf(S.charAt(i));
    }
    String s1 = "maerd";
    String s2 = "remaerd";
    String s3 = "esare";
    String s4 = "resare";
    String ans = "YES";
    for(int i = 0; i < l;) {
      if((i + 5 <= l) && (s1.equals(inverse.substring(i, i + 5)))) {
        i += 5;
      } else if((i + 7 <= l) && (s2.equals(inverse.substring(i, i + 7)))) {
        i += 7;
      } else if((i + 5 <= l) && (s3.equals(inverse.substring(i, i + 5)))) {
        i += 5;
      } else if((i + 6 <= l) && (s4.equals(inverse.substring(i, i + 6)))) {
        i += 6;
      } else {
        ans = "NO";
        break;
      }
    }
    System.out.println(ans);
  }
}

Compiler output:
main.c:1:1: error: unknown type name 'import'
    1 | import java.util.*;
      | ^~~~~~
main.c:1:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
    1 | import java.util.*;
      |            ^
main.c:3:1: error: unknown type name 'public'
    3 | public class Main {
      | ^~~~~~
main.c:3:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'Main'
    3 | public class Main {
      |              ^~~~
Language: Java

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader input =new BufferedReader (new InputStreamReader (System.in));
		String str = input.readLine( );

		while(str.length() != 0){
			if(str.matches("^(dreamer)+.*") && !str.startsWith("dreamerase")){
				while(str.matches("^(dreamer)+.*") && !str.startsWith("dreamerase")){
					str = str.substring(7);
				}
			}else if(str.matches("^(eraser)+.*")){
				while(str.matches("^(eraser)+.*")){
					str = str.substring(6);
				}
			}else if(str.matches("^(dream)+.*") || str.matches("^(erase)+.*")){
					str = str.substring(5);
			}else{
				System.out.println("NO");
				System.exit(0);
			}
		}
		System.out.println("YES");
	}
}

Compiler output:
Main.java:3: error: cannot find symbol
	public static void main(String[] args) throws IOException {
	                                              ^
  symbol:   class IOException
  location: class Main
Main.java:4: error: cannot find symbol
		BufferedReader input =new BufferedReader (new InputStreamReader (System.in));
		^
  symbol:   class BufferedReader
  location: class Main
Main.java:4: error: cannot find symbol
		BufferedReader input =new BufferedReader (new InputStreamReader (System.in));
		                          ^
  symbol:   class BufferedReader
  location: class Main
Main.java:4: error: cannot find symbol
		BufferedReader input =new BufferedReader (new InputStreamReader (System.in));
		                                              ^
  symbol:   class InputStreamReader
  location: class Main
4 errors
Language: Java

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    int len = S.length();
    String ans = "NO";
    if(len >= 5) {
      // dp[i]はインデックスi～末尾までの部分文字列に対する判定結果を返す（出来るなら1、出来ないなら-1）
      int[] dp = new int[len];
      dp[len - 1] = -1;
      dp[len - 2] = -1;
      dp[len - 3] = -1;
      dp[len - 4] = -1;
      dp[len - 5] = -1;
      String str = S.substring(len - 5);
      if(str.equals("dream") || str.equals("erase")) dp[len - 5] = 1;
      for(int i = len - 6; i >= 0; i--) {
        dp[i] = -1;
        String str5 = S.substring(i, i + 5);
        String str6 = S.substring(i, i + 6);
        String str7;
        if(i + 7 <= len) str7 = S.substring(i, i + 7);
        if((str5.equals("dream") || str5.equals("erase")) && dp[i + 5] == 1) dp[i] = 1;
        if(str6.equals("eraser") && dp[i + 6] == 1) dp[i] = 1;
        if((i + 7 <= len) && str7.equals("dreamer") && dp[i + 7] == 1) dp[i] = 1;
      }
      if(dp[0] == 1) ans = "YES";
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:27: error: variable str7 might not have been initialized
        if((i + 7 <= len) && str7.equals("dreamer") && dp[i + 7] == 1) dp[i] = 1;
                             ^
1 error
Language: Java

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    int len = S.length();
    String ans = "NO";
    if(len >= 5) {
      // dp[i]はインデックスi～末尾までの部分文字列に対する判定結果を返す（出来るなら1、出来ないなら-1）
      int[] dp = new int[len];
      dp[len - 1] = -1;
      dp[len - 2] = -1;
      dp[len - 3] = -1;
      dp[len - 4] = -1;
      dp[len - 5] = -1;
      String str = S.substring(len - 5);
      if(str.equals("dream") || str.equals("erase")) dp[len - 5] = 1;
      for(int i = len - 6; i >= 0; i--) {
        dp[i] = -1;
        String str5 = S.substring(i, i + 5);
        String str6 = S.substring(i, i + 6);
        if((i + 7) <= len) String str7 = S.substring(i, i + 7);
        if((str5.equals("dream") || str5.equals("erase")) && dp[i + 5] == 1) dp[i] = 1;
        if(str6.equals("eraser") && dp[i + 6] == 1) dp[i] = 1;
        if(((i + 7) <= len) && str7.equals("dreamer") && dp[i + 7] == 1) dp[i] = 1;
      }
      if(dp[0] == 1) ans = "YES";
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:23: error: variable declaration not allowed here
        if((i + 7) <= len) String str7 = S.substring(i, i + 7);
                                  ^
1 error
Language: Java

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    int len = S.length();
    String ans = "NO";
    if(len >= 5) {
      // dp[i]はインデックスi～末尾までの部分文字列に対する判定結果を返す（出来るなら1、出来ないなら-1）
      int[] dp = new int[len];
      dp[len - 1] = -1;
      dp[len - 2] = -1;
      dp[len - 3] = -1;
      dp[len - 4] = -1;
      dp[len - 5] = -1;
      String str = S.substring(len - 5);
      if(str.equals("dream") || str.equals("erase")) dp[len - 5] = 1;
      for(int i = len - 6; i >= 0; i--) {
        dp[i] = -1;
        String str5 = S.substring(i, i + 5);
        String str6 = S.substring(i, i + 6);
        if(i + 7 <= len) String str7 = S.substring(i, i + 7);
        if((str5.equals("dream") || str5.equals("erase")) && dp[i + 5] == 1) dp[i] = 1;
        if(str6.equals("eraser") && dp[i + 6] == 1) dp[i] = 1;
        if((i + 7 <= len) && str7.equals("dreamer") && dp[i + 7] == 1) dp[i] = 1;
      }
      if(dp[0] == 1) ans = "YES";
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:23: error: variable declaration not allowed here
        if(i + 7 <= len) String str7 = S.substring(i, i + 7);
                                ^
1 error
Language: Java

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    int len = S.length();
    String ans = "NO";
    if(len >= 5) {
      // dp[i]はインデックスi～末尾までの部分文字列に対する判定結果を返す（出来るなら1、出来ないなら-1）
      int[] dp = new int[len];
      dp[len - 1] = -1;
      dp[len - 2] = -1;
      dp[len - 3] = -1;
      dp[len - 4] = -1;
      dp[len - 5] = -1;
      String str = S.substring(i - 5);
      if(str.equals("dream") || str.equals("erase")) dp[len - 5] = 1;
      for(int i = len - 6; i >= 0; i--) {
        dp[i] = -1;
        String str5 = S.substring(i, i + 5);
        String str6 = S.substring(i, i + 6);
        String str7 = S.substring(i, i + 7);
        if((str5.equals("dream") || str5.equals("erase")) && dp[i + 5] == 1) dp[i] = 1;
        if(str6.equals("eraser") && dp[i + 6] == 1) dp[i] = 1;
        if(str7.equals("dreamer") && dp[i + 7] == 1) dp[i] = 1;
      }
      if(dp[0] == 1) ans = "YES";
    }
    System.out.println(ans);
  }
}

Compiler output:
Main.java:17: error: cannot find symbol
      String str = S.substring(i - 5);
                               ^
  symbol:   variable i
  location: class Main
1 error
Language: C++

s=gets.chop
k=s.size
while k>0
    if s[k-5, 5]=='dream' or s[k-5, 5]=='erase'
        k-=5
    elsif s[k-6, 6]=='eraser'
        k-=6
    elsif s[k-7, 7]=='dreamer'
        k-=7
    else
        break
    end
end
puts (k>0 ? "NO" : "YES")


Compiler output:
a.cc:4:19: warning: multi-character literal with 5 characters exceeds 'int' size of 4 bytes
    4 |     if s[k-5, 5]=='dream' or s[k-5, 5]=='erase'
      |                   ^~~~~~~
a.cc:4:41: warning: multi-character literal with 5 characters exceeds 'int' size of 4 bytes
    4 |     if s[k-5, 5]=='dream' or s[k-5, 5]=='erase'
      |                                         ^~~~~~~
a.cc:6:22: warning: multi-character literal with 6 characters exceeds 'int' size of 4 bytes
    6 |     elsif s[k-6, 6]=='eraser'
      |                      ^~~~~~~~
a.cc:8:22: warning: multi-character literal with 7 characters exceeds 'int' size of 4 bytes
    8 |     elsif s[k-7, 7]=='dreamer'
      |                      ^~~~~~~~~
a.cc:1:1: error: 's' does not name a type
    1 | s=gets.chop
      | ^
Language: C++

#include <iostream>
#include <string>

using namespace std;

int main()
{
	string str;
	int flag=1;
	cin >> str;
	string dream = "maerd";
	string dreamer = "remaerd";
	string erase = "esare";
	string eraser = "resare";
	reverse(begin(str),end(str));
	while(flag!=0)
	{
		flag = 0;
		if(dream==str.substr(0,5))
		{
			str.replace(0,5,"");
			flag = 1;
		}
		if(dreamer==str.substr(0,7))
		{
			str.replace(0,7,"");
			flag = 1;
		}
		if(erase==str.substr(0,5))
		{
			str.replace(0,5,"");
			flag = 1;
		}
		if(eraser==str.substr(0,6))
		{
			str.replace(0,6,"");
			flag = 1;
		}
	}
	if(str=="")
	{
		cout << "YES" <<endl;
	}else{
		cout << "NO" <<endl;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: 'reverse' was not declared in this scope
   15 |         reverse(begin(str),end(str));
      |         ^~~~~~~
Language: C

#include <stdio.h>
#include <string.h>

char *tbl[] = {"dreamer", "eraser", "dream", "erase"};
int len[] {6, 6, 5, 5};
char str[100001];

int main() {

	scanf("%s", str);

	while(*str != '\0') {
		for(pos = 0; pos < 4; pos++) {
			if(strncmp(tbl[pos], str, len[pos])) == 0) {
				break;
			}
		}
		if(pos == 4) {
			printf("NO\n");
			return 0;
		}
		str += len[pos];
	}

	printf("YES\n");

	return 0;

}

Compiler output:
main.c:5:11: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
    5 | int len[] {6, 6, 5, 5};
      |           ^
main.c: In function 'main':
main.c:13:21: error: 'pos' undeclared (first use in this function)
   13 |                 for(pos = 0; pos < 4; pos++) {
      |                     ^~~
main.c:13:21: note: each undeclared identifier is reported only once for each function it appears in
main.c:14:51: error: 'len' undeclared (first use in this function)
   14 |                         if(strncmp(tbl[pos], str, len[pos])) == 0) {
      |                                                   ^~~
main.c:14:62: error: expected expression before '==' token
   14 |                         if(strncmp(tbl[pos], str, len[pos])) == 0) {
      |                                                              ^~
main.c:14:66: error: expected statement before ')' token
   14 |                         if(strncmp(tbl[pos], str, len[pos])) == 0) {
      |                                                                  ^
Language: C++

#include<bits/stdc++.h>
using namespace std;

int main(){
    string s;
    cin>>s;
    bool isok=true;
    const string st[4]={"dream","dreamer","erase","eraser"};

    for(int i=s.size()-1;i>=0;i++){
        if(s[i]=='r'){
            if(i-2>=0){
                if(s[i-2]=='m' && i-6>=0){
                    for(int j=0;j<7;j++){
                        if(s[i-j]!=st[1][6-j]){
                            isok=false;
                        }
                    }
                    i-=7;
                }
                else if(s[i-2]=='s' && i=5>=0){
                    for(int j=0;j<6;j++){
                        if(s[i-j]!=st[3][5-j]){
                            isok=false;
                        }
                    }
                    i-=6;
                }
            }
            else{
                isok=false;
            }

        }
        else if(s[i]=='m'){
            for(int j=0;j<5;j++){
                if(i-j<0 || s[i-j]!=st[0][4-j]){
                    isok=false;
                }
            }
            i-=5;
        }
        else if(s[i]=='e'){
            for(int j=0;j<5;j++){
                if(i-j<0 || s[i-j]!=st[2][4-j]){
                    isok=false;
                }
            }
        }
        else{
            isok=false;
        }

    }
    if(isok) cout<<"YES"<<endl;
    else cout<<"NO"<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:37: error: lvalue required as left operand of assignment
   21 |                 else if(s[i-2]=='s' && i=5>=0){
Language: C++


#include <iostream>
using namespace std;

int main(int argc, const char * argv[]) {
    string pattern[] = {"remaerd", "resare", "maerd", "esare"};
    string S;
    cin >> S;
    //Sを反転
    reverse(S.begin(), S.end());
    cout << S.substr(S.length(),-5);
    int temp = 0;
    
    bool possible = true;
    while(temp < S.length()){
        bool clear = false;
        for(auto p:pattern){
            string t = S.substr(temp,p.length());
            if(t == p){
                temp += p.length();
                clear = true;
                break;
            }
        }
        if(!clear){ possible = false; break;}
    }
    
    if(possible) cout << "YES";
    else cout << "NO";
    return 0;
}

Compiler output:
a.cc: In function 'int main(int, const char**)':
a.cc:10:5: error: 'reverse' was not declared in this scope
   10 |     reverse(S.begin(), S.end());
      |     ^~~~~~~
Language: Java

import java.util.ArrayList;
import java.util.Scanner;


public class Main {

	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		String S=sc.next();
		if(S.length()<5)System.out.println("NO");
		StringBuilder s=new StringBuilder(S); 
		ArrayList<String>de=new ArrayList<>();
		de.add("dream");
		de.add("dreamer");
		de.add("erase");
		de.add("eraser");
		while(true){
			if(de.contains(s.substring(0,s.length()))){System.out.println("YES");break;}
			if(s.length()<5 || s.length()==6 || s.length()==8 || s.length()==9){System.out.println("NO");break;}
			if(s.substring(0,6).equals("dreamd")||s.substring(0,6).equals("dreame"))s.delete(0,5);
			else if(s.length()>=6&&(s.substring(0,6).equals("erasee")||s.substring(0,6).equals("erased")))s.delete(0,5);
			else if(s.length()>=7&&(s.substring(0,7).equals("erasere")||s.substring(0,7).equals("eraserd")))s.delete(0,6);
			else if(s.length()>=8&&(s.substring(0,8).equals("dreamerd")||s.substring(0,8).equals("dreamere")))s.delete(0,7);
			else {System.out.println("NO");break;}
			
		}
		
		
}

Compiler output:
Main.java:29: error: reached end of file while parsing
}
 ^
1 error
Language: C++

#include <iostream>
#include <cmath>
#include <cstdio>
#include <vector>
#include <string>

using namespace std;

int main() {
    int flag = 1;
    int sum = 0;
    string s;
    cin >> s;
    reverse(s.begin(), s.end());
        size_t dreamer, eraser, dream, erase;
    while (1)
    {

        dream = s.find("maerd");
        if (dream == 0)
        {
            s.replace(dream, 5, "0");
            s.erase(s.begin() + dream);
            continue;
        }
        dreamer = s.find("remaerd");
        if (dreamer == 0)
        {
            s.replace(dreamer, 7, "0");
            s.erase(s.begin() + dreamer);
            continue;
        }
        erase = s.find("esare");
        if (erase == 0)
        {
            s.replace(erase, 5, "0");
            s.erase(s.begin() + erase);
            continue;
        }
        eraser = s.find("resare");
        if (eraser == 0)
        {
            s.replace(eraser, 6, "0");
            s.erase(s.begin() + eraser);
            continue;
        }
        
        
        
        
        
        

        //dreamer = s.find("remaerd");
        //eraser = s.find("resare");
        //dream = s.find("maerd");
        //erase = s.find("esare");

        if (dreamer == -1 && eraser == -1 && dream == -1 && erase == -1)
        {

            if (s[0] == NULL)
            {
                cout << "Yes" << endl;
                exit(0);
            }
            else
            {
                cout << "No" << endl;
                exit(0);
            }

        }
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'reverse' was not declared in this scope
   14 |     reverse(s.begin(), s.end());
      |     ^~~~~~~
a.cc:62:25: warning: NULL used in arithmetic [-Wpointer-arith]
   62 |             if (s[0] == NULL)
      |                         ^~~~
Language: C++

#include <iostream>
#include <cmath>
#include <cstdio>
#include <vector>
#include <string>

using namespace std;

int main() {
    int flag = 1;
    int sum = 0;
    string s;
    cin >> s;
    reverse(s.begin(), s.end());
    while (1)
    {
        size_t dreamer, eraser, dream, erase;
        dream = s.find("maerd");
        if (dream == 0)
        {
            s.replace(dream, 5, "0");
            s.erase(s.begin() + dream);
            continue;
        }
        dreamer = s.find("remaerd");
        if (dreamer == 0)
        {
            s.replace(dreamer, 7, "0");
            s.erase(s.begin() + dreamer);
            continue;
        }
        erase = s.find("esare");
        if (erase == 0)
        {
            s.replace(erase, 5, "0");
            s.erase(s.begin() + erase);
            continue;
        }
        eraser = s.find("resare");
        if (eraser == 0)
        {
            s.replace(eraser, 6, "0");
            s.erase(s.begin() + eraser);
            continue;
        }
        
        
        
        
        
        

        //dreamer = s.find("remaerd");
        //eraser = s.find("resare");
        //dream = s.find("maerd");
        //erase = s.find("esare");

        if (dreamer == -1 && eraser == -1 && dream == -1 && erase == -1)
        {
            for (int i = 0; i < s.length(); i++)
            {
                sum += s[i] - 48;
            }

            if (sum == 0)
            {
                cout << "Yes" << endl;
                exit(0);
            }
            else
            {
                cout << "No" << endl;
                exit(0);
            }

        }
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:5: error: 'reverse' was not declared in this scope
   14 |     reverse(s.begin(), s.end());
      |     ^~~~~~~