Submission #3201901

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Source Code Expand

#include <cstdio>
#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <map>

using namespace std;

typedef long long ll;

int r[100005];
int c[100005];

int ROW[100005];
int COL[100005];

map<int,ll>numR;
map<int,ll>numC;


int main(){

	int R,C,K;

	scanf("%d %d %d",&R,&C,&K);

	int N;

	scanf("%d",&N);

	int i;

	for(i=0;i<N;i++){
	scanf("%d %d",&r[i],&c[i]);
	ROW[r[i]]++;
	COL[c[i]]++;
	}

	ll ans=0ll;

	for(i=1;i<=R;i++){
		numR[ROW[i]]++;
	}

	for(i=1;i<=C;i++){
		numC[COL[i]]++;
	}

	for(i=0;i<=K;i++){
	ans+=numR[i]*numC[K-i];
	}

	for(i=0;i<N;i++){
		if(ROW[r[i]]+COL[c[i]]==K){ans-=1ll;}
		if(ROW[r[i]]+COL[c[i]]==K+1){ans+=1ll;}
	}

	printf("%lld\n",ans);

	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:26:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d",&R,&C,&K);
                            ^
./Main.cpp:30:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&N);
                ^
./Main.cpp:35:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&r[i],&c[i]);
                            ^

Judge Result