oj.uz

Submission #27258

# Submission time Handle Problem Language Result Execution time Memory
27258 2017-07-11T23:20:16 Z TAMREF Star triangles (IZhO11_triangle) C++11
100 / 100
 269 ms 9052 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mx=3e5+5;
int x[mx], y[mx], xc[mx], yc[mx], xo[mx], yo[mx];
int main(){
    int N;
    scanf("%d",&N);
    for(int i=0;i<N;i++){
        scanf("%d%d",&x[i],&y[i]);
        xc[i]=x[i], yc[i]=y[i];
    }
    int u,v;
    sort(xc,xc+N); u=unique(xc,xc+N)-xc;
    sort(yc,yc+N); v=unique(yc,yc+N)-yc;
    for(int i=0;i<N;i++){
        x[i]=lower_bound(xc,xc+u,x[i])-xc;
        ++xo[x[i]];
        y[i]=lower_bound(yc,yc+v,y[i])-yc;
        ++yo[y[i]];
    }
    ll ans=0;
    for(int i=0;i<N;i++){
        ans+=1LL*(xo[x[i]]-1)*(yo[y[i]]-1);
    }
    printf("%lld\n",ans);
}

Compilation message

triangle.cpp: In function 'int main()':
triangle.cpp:8:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&N);
                   ^
triangle.cpp:10:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&x[i],&y[i]);
                                  ^

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 9052 KB Output is correct
2 Correct 0 ms 9052 KB Output is correct
3 Correct 0 ms 9052 KB Output is correct
4 Correct 0 ms 9052 KB Output is correct
5 Correct 0 ms 9052 KB Output is correct
6 Correct 0 ms 9052 KB Output is correct
7 Correct 0 ms 9052 KB Output is correct
8 Correct 0 ms 9052 KB Output is correct
9 Correct 0 ms 9052 KB Output is correct
10 Correct 0 ms 9052 KB Output is correct
11 Correct 0 ms 9052 KB Output is correct
12 Correct 6 ms 9052 KB Output is correct
13 Correct 6 ms 9052 KB Output is correct
14 Correct 6 ms 9052 KB Output is correct
15 Correct 79 ms 9052 KB Output is correct
16 Correct 99 ms 9052 KB Output is correct
17 Correct 79 ms 9052 KB Output is correct
18 Correct 76 ms 9052 KB Output is correct
19 Correct 239 ms 9052 KB Output is correct
20 Correct 173 ms 9052 KB Output is correct
21 Correct 269 ms 9052 KB Output is correct
22 Correct 233 ms 9052 KB Output is correct