Submission #1677543

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Source Code Expand

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

typedef long long ll;
#define REP(i,n) for(int i=0,_n=(int)(n);i<_n;++i)
template<class T>bool chmin(T&a,const T&b){return a>b?(a=b,true):false;}
template<class T>bool chmax(T&a,const T&b){return a<b?(a=b,true):false;}

int nextInt() { int x; scanf("%d", &x); return x;}

int x[100];
int y[100];

int main2() {
  int N = nextInt();
  REP(i, N) {
    x[i] = nextInt();
    y[i] = nextInt();
  }

  int ans = 0;
  REP(i, N) {
    REP(j, i) {
      REP(k, j) {
        ll x1 = x[j] - x[i];
        ll y1 = y[j] - y[i];
        ll x2 = x[k] - x[i];
        ll y2 = y[k] - y[i];
        ll c = abs(x1*y2 - x2*y1);
        if (c > 0 && c % 2 == 0) {
          ans++;
        }
      }
    }
  }
  cout << ans << endl;

  return 0;
}

int main() {
  for (;!cin.eof();cin>>ws) main2();
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int nextInt()’:
./Main.cpp:9:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
 int nextInt() { int x; scanf("%d", &x); return x;}
                                       ^

Judge Result