#include<stdio.h> int main(){ bool suc = true; int t,n,i,distance; int trap[100][2]; scanf("%d",&t); while(t--){ scanf("%d",&n); for(i=0;i<n;i++){ scanf("%d%d",&trap[i][0],&trap[i][1]); } distance = trap[1][0]-trap[0][0]; for(i=0;i<n;i++){ if(trap[i][1]>(i+1)*distance){ suc = false; break; } } if(suc) printf("YES\n"); else printf("NO\n"); } } |
Double click to view unformatted code.