Language: C++

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

#define inf 1072114514
#define llinf 4154118101919364364
#define mod 1000000007
#define pi 3.1415926535897932384
 

int round(int a,int b){if((a%b)*2 >= b){return (a/b)+1;}return a/b;} 
int gcd(int a,int b){int c;while(b!=0){c=a%b;a=b;b=c;}return a;}  //　最大公約数
int lcm(int a,int b){int c=gcd(a,b);a/=c;return a*b;}       // 最小公倍数
int nCr(int a,int b){int i,r=1;for(i=1;i<=b;i++){r*=(a+1-i);r/=i;}return r;} // コンビネーション
int nHr(int a,int b){return nCr(a+b-1,b);} // 重複組み合わせ
int fact(int a){int i,r=1;for(i=1;i<=a;i++){r*=i;}return r;} // 階乗
int pow(int a,int b){int i,r=1;for(i=1;i<=b;i++){r*=a;}return r;}　// a~bまでの階乗
int dsum(int x){int r=0;while(x){r+=(x%10);x/=10;}return r;}　　//数字の各位の和
int dsumb(int x,int b){int r=0;while(x){r+=(x%b);x/=b;}return r;}　// b進数の各位の和？
int sankaku(int x){return ((1+x)*x)/2;}　//三角数　xまでの和

//以下long long ver
long long llmax(long long a,long long b){if(a>b){return a;}return b;}
long long llmin(long long a,long long b){if(a<b){return a;}return b;}
long long llzt(long long a,long long b){return llmax(a,b)-llmin(a,b);}
long long llround(long long a,long long b){if((a%b)*2 >= b){return (a/b)+1;}return a/b;}
long long llceil(long long a,long long b){if(a%b==0){return a/b;}return (a/b)+1;}
long long llgcd(long long a,long long b){long long c;while(b!=0){c=a%b;a=b;b=c;}return a;}
long long lllcm(long long a,long long b){long long c=llgcd(a,b);a/=c;return a*b;}
long long llnCr(long long a,long long b){long long i,r=1;for(i=1;i<=b;i++){r*=(a+1-i);r/=i;}return r;}
long long llnHr(long long a,long long b){return llnCr(a+b-1,b);}
long long llfact(long long a){long long i,r=1;for(i=1;i<=a;i++){r*=i;}return r;}
long long llpow(long long a,long long b){long long i,r=1;for(i=1;i<=b;i++){r*=a;}return r;}
long long lldsum(long long x){long long r=0;while(x){r+=(x%10);x/=10;}return r;}
long long lldsumb(long long x,long long b){long long r=0;while(x){r+=(x%b);x/=b;}return r;}
long long llsankaku(long long x){return ((1+x)*x)/2;}

//double
double dbmax(double a,double b){if(a>b){return a;}return b;}
double dbmin(double a,double b){if(a<b){return a;}return b;}
double dbzt(double a,double b){return dbmax(a,b)-dbmin(a,b);}


typedef pair<int, int> ii;
typedef long long ll;
typedef vector<ll> vll;
typedef pair<ll,ll> pll;
#define forr(i,a,b) for(int i=(a); i<(b); i++)
#define clean(arr,val) memset(arr,val,sizeof(arr))
#define forn(i,n) forr(i,0,n)
#define PB push_back
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<pll> vpll;
 
/*CODE START HERE*/
int main() {
  int w, a,b;
  cin >> w >> a >> b;
  int c =  ads(b-a) - w
  cout << ( c> 0 ? c : 0) << endl;
}


Compiler output:
a.cc:16:66: error: extended character 　 is not valid in an identifier
   16 | int pow(int a,int b){int i,r=1;for(i=1;i<=b;i++){r*=a;}return r;}　// a~bまでの階乗
      |                                                                  ^
a.cc:17:61: error: extended character 　 is not valid in an identifier
   17 | int dsum(int x){int r=0;while(x){r+=(x%10);x/=10;}return r;}　　//数字の各位の和
      |                                                             ^
a.cc:17:61: error: extended character 　 is not valid in an identifier
a.cc:18:66: error: extended character 　 is not valid in an identifier
   18 | int dsumb(int x,int b){int r=0;while(x){r+=(x%b);x/=b;}return r;}　// b進数の各位の和？
      |                                                                  ^
a.cc:19:40: error: extended character 　 is not valid in an identifier
   19 | int sankaku(int x){return ((1+x)*x)/2;}　//三角数　xまでの和
      |                                        ^
a.cc:16:66: error: '\U00003000' does not name a type
   16 | int pow(int a,int b){int i,r=1;for(i=1;i<=b;i++){r*=a;}return r;}　// a~bまでの階乗
      |                                                                  ^~
a.cc:17:61: error: '\U00003000\U00003000' does not name a type
   17 | int dsum(int x){int r=0;while(x){r+=(x%10);x/=10;}return r;}　　//数字の各位の和
      |                                                             ^~~~
a.cc:18:66: error: '\U00003000' does not name a type
   18 | int dsumb(int x,int b){int r=0;while(x){r+=(x%b);x/=b;}return r;}　// b進数の各位の和？
      |                                                                  ^~
a.cc:19:40: error: '\U00003000' does not name a type
   19 | int sankaku(int x){return ((1+x)*x)/2;}　//三角数　xまでの和
      |                                        ^~
a.cc: In function 'long long int llzt(long long int, long long int)':
a.cc:24:48: error: 'llmax' was not declared in this scope
   24 | long long llzt(long long a,long long b){return llmax(a,b)-llmin(a,b);}
      |                                                ^~~~~
a.cc: In function 'int main()':
a.cc:59:12: error: 'ads' was not declared in this scope; did you mean 'abs'?
   59 |   int c =  ads(b-a) - w
      |            ^~~
      |            abs