LibreOJ β Round #2」贪心只能过样例

题目友链:https://loj.ac/problem/515

话说这题蛮简单,bitset暴力直接过.

话不多说,上代码!

#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e6 + 10;
int n, a, b;
bitset<maxn> f[110];
int main() {
    cin >> n;
    f[0].set(0);
    for (int i = 1; i <= n; i++) {
        f[i].reset();
        for (cin >> a >> b; a <= b; a++)  //极简暴力写法
            f[i] |= f[i - 1] << (a * a);
    }
    cout << f[n].count();  //输出答案
    return 0;              //拜拜程序
}
原文地址:https://www.cnblogs.com/Xxzxx/p/11328523.html