Submission #19124908

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Source Code Expand

#include <bits/stdc++.h>
#define rep(i, N) for(int i = 0; i < (int)N; i++)
#define CREP(i, l, r) for(int i = l; i <= r; i++)
using namespace std;
typedef long long ll;
typedef tuple<int,int,int> T; 
typedef pair<int,int> P;
typedef vector<int> V;
typedef vector<int> Vll;
const int INF = 1000000000;      //10^9, 2*INF
const ll LLINF = (1LL << 60);   // > 10^18 ll  2*LLINF

int main() {
    int n;
    cin >> n;
    V a(n), b(n); rep(i, n) scanf("%d%d", &a[i],&b[i]);

    int ans = 0;
    rep(i,n) CREP(j,i+1,n-1){
        int dx = a[j]-a[i], dy = b[j] - b[i];

        if(dx == dy || dx == -dy) ans++;
        else{
            if(dy/dx == 0) ans++;
        }
    }

    printf("%d\n", ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:16:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   16 |     V a(n), b(n); rep(i, n) scanf("%d%d", &a[i],&b[i]);
      |                             ~~~~~^~~~~~~~~~~~~~~~~~~~~

Judge Result