Submission #37253

#	Time	Username	Problem	Language	Result	Execution time	Memory
37253		Yusup01	Star triangles (IZhO11_triangle)	C++14	0 / 100	0 ms	18084 KiB

triangle

#include<bits/stdc++.h>
using namespace std;
long long i,j,k,l,m,n,dp[1009][1009],a[1009][1009],x,y,x2,y2,jog,yok,as,s,c;
int main()
{
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	freopen("triangle.in","r",stdin);
	freopen("triangle.out","w",stdout);
	cin>>n;
	for(int i=1; i<=n; i++){cin>>x>>y; a[x][y]=1; x2=max(x2,x); y2=max(y,y2);}
	for(int i=0; i<=x2; i++)
	{
		for(int j=0; j<=y2; j++)
		{
			if(a[i][j]==0) continue;
			yok=0; s=0; as=0; c=0;
			for(int k=i-1; k>=0; k--)
			{
				if(a[k][j]==0) break; else yok++;
			}
			for(int k=i+1; k<=x2; k++)
			{
				if(a[k][j]==0) break; else as++;
			}
			for(int k=j-1; k>=0; k--)
			{
				if(a[i][k]==0) break; else c++;
			}
			for(int k=j+1; k<=y2; k++)
			{
				if(a[i][k]==0) break; else s++;
			}
			jog+=(yok*c)+(yok*s)+(s*as)+(as*c);
		}
	}
	cout<<jog;
}

Compilation message (stderr)

triangle.cpp: In function 'int main()':
triangle.cpp:7:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("triangle.in","r",stdin);
                                  ^
triangle.cpp:8:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("triangle.out","w",stdout);
                                    ^

• Subtask 1: 0 / 100