大一写的代码风格真是糟糕...重写一遍好了
#include<iostream>
#include<algorithm>
#include<string>
#include<cstdio>
using namespace std;
struct Child {
int a, b;
};
bool cmp(const Child& x, const Child& y) {
return x.b < y.b;
}
int main() {
int n, s;
Child child[10000];
while (scanf("%d%d", &n, &s) && n) {
bool flag = true;
for (int i = 0; i < n; i++) {
scanf("%d%d", &child[i].a, &child[i].b);
}
sort(child, child + n, cmp);
for (int i = 0; i < n; i++) {
if (s >= child[i].b) {
s += child[i].a;
} else {
flag = false;
break;
}
}
if (flag) {
printf("YES\n");
} else {
printf("NO\n");
}
}
}