c++ - codeforces shows WA but output is correct on terminal -


when submitted solution codeforces 551c , judge gives me wrong answer on 49th test case. when run same code on terminal (using g++4.9.2) answer comes out correct.

#include <bits/stdc++.h> #include <algorithm> #define endl '\n' using namespace std;  template <class t> inline void dbg(string s,t &a) {       cout << s+" => " << << endl; }  int n,m; int a[100005]; bool check(long long int time) {       long long int consumed,temp=0,diff;       for(int i=1;n!=0 && i<=m;i++)       {             consumed=n;             while(n>0 && consumed<time)             {                   if(!temp)                         temp=a[n];                   diff=temp<(time-consumed)?temp:time-consumed;                   temp-=diff;                   consumed+=diff;                   if(!temp)                         n--;             }       }       if(n==0)             return true;       else             return false; }  int main() {       cin >> n >> m;       for(int i=1;i<=n;i++)             cin >> a[i];        while(a[n]==0) n--;       long long int last_nonempty=n,l=n+1,r=long_max,mid;        while(l<r)       {             mid=l+(r-l)/2;             n=last_nonempty;             if(check(mid))                   r=mid;             else                   l=mid+1;       }       cout << l << endl;        return 0; }

the link submission : http://codeforces.com/contest/551/submission/11582619

please help.


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