Submission #1163634

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Source Code Expand

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

typedef pair<int,int> P;
typedef pair<P,int> PP;
 
int R,C,N,n;

PP G[100005]; 

int c[100005],r[100005],A[100005],X[100005],Y[100005];

const int INF=1000000005;
 
int main(){             
  
  cin>>R>>C>>N; 
  
  for(int i=0; i<N; i++) scanf("%d %d %d", &G[i].first.first, &G[i].first.second, &G[i].second);

  sort(G,G+N);

  for(int i=0; i<N; i++){
  	X[i]=G[i].first.first;
  	Y[i]=G[i].first.second;
  	A[i]=G[i].second;
  }

  for(int i=0; i<100005; i++){
  	c[i]=INF; r[i]=INF;
  }

  c[Y[0]]=0;

  for(int i=0; i<N; i++){
  	if(Y[i]==Y[0]){
  		r[X[i]]=A[i]; 
  	}
  }

while(1){
  for(int i=0; i<N; i++){
  	if(r[X[i]]==INF&&c[Y[i]]!=INF){
  		r[X[i]]=A[i]-c[Y[i]]; 
  	}
  	if(r[X[i]]!=INF&&c[Y[i]]==INF){
  		c[Y[i]]=A[i]-r[X[i]]; 
  	}
  	if(r[X[i]]!=INF&&c[Y[i]]!=INF) n++;
  }
  if(n==N) break;
} 

  for(int i=0; i<N; i++){
  	if(r[X[i]]!=INF&&c[Y[i]]!=INF){
  		if(r[X[i]]+c[Y[i]]!=A[i]){
  			cout<<"No"<<endl; return 0;
  		}
  	}
  }

  int x=INF,y=INF; int p,q;

  for(int i=1; i<=R; i++){
  	if(r[i]<x){
  		x=r[i]; p=i;
  	}
  }

  for(int i=1; i<=C; i++){
  	if(c[i]<y){
  		y=c[i]; q=i;
  	}
  }

  if(r[p]+c[q]<0){
  	cout<<"No"<<endl; return 0;
  }

  cout<<"Yes"<<endl;
  
  return 0;
 
}    

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:20:96: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   for(int i=0; i<N; i++) scanf("%d %d %d", &G[i].first.first, &G[i].first.second, &G[i].second);
                                                                                                ^

Judge Result