HDU-2060

点击打开链接

#include<stdio.h>
int f(int n){
int i,sum;
sum=0;
if(n<7){
for(i=0;i<n;i++)
sum=sum+7-i;
return sum;
}
else {
sum=(n-6)*8+27;
return sum;
}
}
int main (void){
int t,n,a,b;
while(scanf("%d",&t)!=EOF){
while(t--){
scanf("%d%d%d",&n,&a,&b);
if(a+f(n)>=b)printf("Yes\n");
else printf("No\n");
}

}
return 0;
}