Submission #1310272

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Source Code Expand

#include<stdio.h>
#include<iostream>
#include<algorithm>
#include<stdlib.h>
#include<string.h>
#include<queue>
#define LL long long
using namespace std;
inline int read( )
{
  int sum=0;char c=getchar( );bool f=0;
  while(c<'0'||c>'9') {if(c=='-') f=1;c=getchar( );}
  while(c>='0'&&c<='9') {sum=sum*10+c-'0';c=getchar( );}
  if(f) return -sum;
  return sum;
}
int main( )
{
#ifndef ONLINE_JUDGE
  freopen("a.in","r",stdin);
  freopen("a.out","w",stdout);
#endif
  LL n=read( ),a=read( ),b=read( );
  if(a>b) {puts("0");return 0;}
  if(n==1) {printf("%d",a==b);return 0;}
  else printf("%lld",(b-a)*(n-2)+1);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:20:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
   freopen("a.in","r",stdin);
                            ^
./Main.cpp:21:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
   freopen("a.out","w",stdout);
                              ^

Judge Result