oj.uz

답안 #36403

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
36403 2017-12-08T16:33:01 Z DoanPhuDuc Bosses (BOI16_bosses) C++
67 / 100
 1500 ms 2784 KB 
#include <bits/stdc++.h>

#define FOR(x, a, b) for (int x = a; x <= b; ++x)
#define FOD(x, a, b) for (int x = a; x >= b; --x)
#define REP(x, a, b) for (int x = a; x < b; ++x)
#define DEBUG(X) { cout << #X << " = " << X << endl; }
#define PR(A, n) { cout << #A << " = "; FOR(_, 1, n) cout << A[_] << " "; cout << endl; }
#define PR0(A, n)  { cout << #A << " = "; REP(_, 0, n) cout << A[_] << " "; cout << endl; }

using namespace std;

typedef long long LL;
typedef pair <int, int> II;

const int N = 5e3 + 10;
const int INF = 0x3f3f3f3f;

int n, first, last;
int f[N], p[N], Q[5 * N];

vector <int> boss[N], adj[N];

void DFS(int u) {
    f[u] = 1;
    REP(k, 0, adj[u].size()) {
        int v = adj[u][k];
        DFS(v);
        f[u] += f[v];
    }
}

int Compute(int u) {
    FOR(i, 1, n) {
        adj[i].clear();
        p[i] = -1;
    }
    p[u] = 0;
    first = 1; last = 0;
    Q[++last] = u;
    while (first <= last) {
        int u = Q[first++];
        REP(k, 0, boss[u].size()) {
            int v = boss[u][k];
            if (p[v] == -1) {
                adj[u].push_back(v);
                p[v] = u;
                Q[++last] = v;
            }
        }
    }
    int num = 0;
    FOR(i, 1, n) num += (p[i] != -1);
    if (num == n) {
        DFS(u);
        int ans = 0;
        FOR(i, 1, n) ans += f[i];
        return ans;
    } else return INF;
}

int main() {
    #ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif // LOCAL
    scanf("%d", &n);
    FOR(i, 1, n) {
        int m; scanf("%d", &m);
        FOR(j, 1, m) {
            int x; scanf("%d", &x);
            boss[x].push_back(i);
        }
    }
    int ans = INF;
    FOR(i, 1, n) ans = min(ans, Compute(i));
    printf("%d\n", ans);
    return 0;
}

Compilation message

bosses.cpp: In function 'void DFS(int)':
bosses.cpp:5:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define REP(x, a, b) for (int x = a; x < b; ++x)
                                        ^
bosses.cpp:25:5: note: in expansion of macro 'REP'
     REP(k, 0, adj[u].size()) {
     ^
bosses.cpp: In function 'int Compute(int)':
bosses.cpp:5:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define REP(x, a, b) for (int x = a; x < b; ++x)
                                        ^
bosses.cpp:42:9: note: in expansion of macro 'REP'
         REP(k, 0, boss[u].size()) {
         ^
bosses.cpp: In function 'int main()':
bosses.cpp:66:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
bosses.cpp:68:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int m; scanf("%d", &m);
                               ^
bosses.cpp:70:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             int x; scanf("%d", &x);
                                   ^

Subtask #1
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2388 KB Output is correct
2 Correct 0 ms 2388 KB Output is correct
3 Correct 0 ms 2388 KB Output is correct
4 Correct 0 ms 2388 KB Output is correct
5 Correct 0 ms 2388 KB Output is correct
6 Correct 0 ms 2388 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2388 KB Output is correct
2 Correct 0 ms 2388 KB Output is correct
3 Correct 0 ms 2388 KB Output is correct
4 Correct 0 ms 2388 KB Output is correct
5 Correct 0 ms 2388 KB Output is correct
6 Correct 0 ms 2388 KB Output is correct
7 Correct 0 ms 2388 KB Output is correct
8 Correct 0 ms 2388 KB Output is correct
9 Correct 0 ms 2388 KB Output is correct
10 Correct 0 ms 2388 KB Output is correct
11 Correct 0 ms 2388 KB Output is correct

Subtask #3
0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2388 KB Output is correct
2 Correct 0 ms 2388 KB Output is correct
3 Correct 0 ms 2388 KB Output is correct
4 Correct 0 ms 2388 KB Output is correct
5 Correct 0 ms 2388 KB Output is correct
6 Correct 0 ms 2388 KB Output is correct
7 Correct 0 ms 2388 KB Output is correct
8 Correct 0 ms 2388 KB Output is correct
9 Correct 0 ms 2388 KB Output is correct
10 Correct 0 ms 2388 KB Output is correct
11 Correct 0 ms 2388 KB Output is correct
12 Correct 6 ms 2520 KB Output is correct
13 Correct 3 ms 2520 KB Output is correct
14 Correct 236 ms 2520 KB Output is correct
15 Correct 63 ms 2520 KB Output is correct
16 Correct 889 ms 2652 KB Output is correct
17 Execution timed out 1500 ms 2784 KB Execution timed out
18 Halted 0 ms 0 KB -