Submission #934920

#	Time	Username	Problem	Language	Result	Execution time	Memory
934920		hugsfromadicto	Multiply (CEOI17_mul)	C++14	40 / 100	1 ms	348 KiB

mul

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define int long long
using namespace std;
void USACO(string filename){
  freopen((filename+".in").c_str(),"r",stdin);
  freopen((filename+".out").c_str(),"w",stdout);
}
const int mxN = 1e6;
int a[mxN];



void _()
{
    int n,m,a,b;
    cin >> n >> m >> a >> b;
    cout << a * b << endl;
}



main()
{

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int tc = 1;
    while(tc--)
        _();
}

Compilation message (stderr)

mul.cpp:23:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   23 | main()
      | ^~~~
mul.cpp: In function 'void USACO(std::string)':
mul.cpp:6:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |   freopen((filename+".in").c_str(),"r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mul.cpp:7:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |   freopen((filename+".out").c_str(),"w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 30