U盘量产检查闪存编码失败_北信源安全u盘忘记密码

#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;
const int N = 1100;
int n, p, s, w[N], v[N], l = N, r, mid, ans = -1, f[N];
bool check(int x) {
    memset (f, 0, sizeof (f));
    for(int i = 1; i <= n; i++) 
        if (w[i] <= x)
            for(int j = s; j >= w[i]; j--)
                f[j] = max(f[j], f[j - w[i]] + v[i]);
    if (f[s] < p) return false;
    return true;
}
int main() {
    scanf("%d%d%d", &n, &p, &s);
    for(int i = 1; i <= n; i++) {
        scanf("%d%d", &w[i], &v[i]);
        if(w[i] > r) r = w[i];
        if(w[i] < l) l = w[i];
    }
    while(l < r) {
        mid = (l + r) >> 1;
        if(check(mid)) {
            ans = mid;
            r = mid;
        }
        else l = mid + 1;
    }
    if(ans != -1) 
        printf("%d\n", ans);
    else printf ("No Solution!\n");
    return 0;
}