Language: C++

/**
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*/
#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cassert>

#define F first
#define S second
#define endl '\n'
#define deb(x) cout<<#x<<' '<<x<<endl;
#define pb push_back


#ifdef IZI_KATKA
#define int __int64_t
#else
#define int __int64
#endif

const long long MOD = 1e9 + 7;
const long long MAXN = 1e6 + 1;
using namespace std;

typedef long long ll;

long long readInt() {
    bool minus1 = false;
    long long result = 0;
    char ch;
    ch = getchar();
    while (true) {
        if (ch == '-') break;
        if (ch >= '0' && ch <= '9') break;
        ch = getchar();
    }
    if (ch == '-') minus1 = true; else result = ch-'0';
    while (true) {
        ch = getchar();
        if (ch < '0' || ch > '9') break;
        result = result*10 + (ch - '0');
    }
    if (minus1)
        return -result;
    else
        return result;
}

int go(int x) {
	return (x * (x + 1)) / 2;
}

 main() {
	#ifdef IZI_KATKA
	assert(freopen("input", "r", stdin));
    assert(freopen("output", "w", stdout));
    #endif
    int n = readInt(), A = readInt(), B = readInt(), C = readInt(), D = readInt();
    ///A + 2 * A + 3 * A + 4 * A .... = A (1 + 2 + 3 ...)
    n -= 2;
    for (int i = 0; i <= n; i++) {
		int kol1 = A + C * go(i);
		int kol2 = B + C * go(n - i);
		int diff = (kol1 - kol2);
		if (diff > 0) {
		    if (i == 0) continue;
		    int k = (diff + i - 1) / i;
		    if (k <= D - C && k != i) {
				cout << "YES";
				return 0;	
			}
		} else if (diff < 0) {
			if (i == n) continue;
			diff = abs(diff);
			int k = (diff + n - i + 1) / (n - i);
			if (k <= D - C && k != n - i) {
				cout << "YES";				
			}
		} else {
			cout << "YES";
			return 0;			
		}
    }
    cout << "NO";   
    return 0;
}

Compiler output:
a.cc:36:13: error: '__int64' does not name a type; did you mean '__int64_t'?
   36 | #define int __int64
      |             ^~~~~~~
a.cc:67:1: note: in expansion of macro 'int'
   67 | int go(int x) {
      | ^~~
a.cc:71:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   71 |  main() {
      |  ^~~~
a.cc: In function 'int main()':
a.cc:36:13: error: '__int64' was not declared in this scope; did you mean '__ynf64'?
   36 | #define int __int64
      |             ^~~~~~~
a.cc:76:5: note: in expansion of macro 'int'
   76 |     int n = readInt(), A = readInt(), B = readInt(), C = readInt(), D = readInt();
      |     ^~~
a.cc:78:5: error: 'n' was not declared in this scope; did you mean 'yn'?
   78 |     n -= 2;
      |     ^
      |     yn
a.cc:79:14: error: expected ';' before 'i'
   79 |     for (int i = 0; i <= n; i++) {
      |              ^
a.cc:79:21: error: 'i' was not declared in this scope
   79 |     for (int i = 0; i <= n; i++) {
      |                     ^
a.cc:80:21: error: expected ';' before 'kol1'
   80 |                 int kol1 = A + C * go(i);
      |                     ^~~~
a.cc:81:21: error: expected ';' before 'kol2'
   81 |                 int kol2 = B + C * go(n - i);
      |                     ^~~~
a.cc:82:21: error: expected ';' before 'diff'
   82 |                 int diff = (kol1 - kol2);
      |                     ^~~~
a.cc:83:21: error: 'diff' was not declared in this scope
   83 |                 if (diff > 0) {
      |                     ^~~~
a.cc:85:25: error: expected ';' before 'k'
   85 |                     int k = (diff + i - 1) / i;
      |                         ^
a.cc:86:25: error: 'k' was not declared in this scope
   86 |                     if (k <= D - C && k != i) {
      |                         ^
a.cc:86:30: error: 'D' was not declared in this scope
   86 |                     if (k <= D - C && k != i) {
      |                              ^
a.cc:86:34: error: 'C' was not declared in this scope
   86 |                     if (k <= D - C && k != i) {
      |                                  ^
a.cc:93:29: error: expected ';' before 'k'
   93 |                         int k = (diff + n - i + 1) / (n - i);
      |                             ^
a.cc:94:29: error: 'k' was not declared in this scope
   94 |                         if (k <= D - C && k != n - i) {
      |                             ^
a.cc:94:34: error: 'D' was not declared in this scope
   94 |                         if (k <= D - C && k != n - i) {
      |                                  ^
a.cc:94:38: error: 'C' was not declared in this scope
   94 |                         if (k <= D - C && k != n - i) {
      |                                      ^