Submission #717873

#	Time	Username	Problem	Language	Result	Execution time	Memory
717873		blackslex	Bosses (BOI16_bosses)	C++17	100 / 100	743 ms	636 KiB

bosses

#include<bits/stdc++.h>

using namespace std;

const int N = 5005;
int n, m, x, ans = INT_MAX;
vector<int> v[N];

int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &m);
        while (m--) scanf("%d", &x), v[x].emplace_back(i);
    }
    for (int i = 1; i <= n; i++) {
        int d[N] = {}, res = 0;
        queue<int> q;
        bool f = 0;
        d[i] = 1, q.emplace(i);
        while (!q.empty()) {
            int cur = q.front(); q.pop();
            for (auto &e: v[cur]) if (!d[e]) d[e] = d[cur] + 1, q.emplace(e);
        }
        for (int j = 1; j <= n; j++) res += d[j], f = (!d[j] ? 1 : f);
        if (!f) ans = min(ans, res);
    }
    printf("%d", ans);
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
bosses.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |         scanf("%d", &m);
      |         ~~~~~^~~~~~~~~~
bosses.cpp:13:26: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         while (m--) scanf("%d", &x), v[x].emplace_back(i);
      |                     ~~~~~^~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33