제출 #531172

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
531172		KazamaHoang	Autobus (COCI22_autobus)	C++14	70 / 70	127 ms	8228 KiB

Main

// no matter how hard you work, someone else is working harder
#include <bits/stdc++.h>
#define FOR(i, a, b) for (int i = (a), _i = (b); i <= _i; ++ i)
#define FORD(i, b, a) for (int i = (b), _i = (a); i >= _i; -- i)
#define REP(i, b) for (int i = 0, _i = (b); i < _i; ++ i)
#define FORE(i, a) for (auto& i : a)
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define cntbit __builtin_popcountll
#define len(x) (int)x.size()
#define bit(x, i) (((x) >> (i)) & 1)
#define all(x) x.begin(), x.end()
using namespace std;
using ll = long long;
template <typename A, typename B>
inline bool ckmax(A& a, const B& b) {
    if (a < b) {
        a = b;
        return true;
    } return false;
}
template <typename A, typename B>
inline bool ckmin(A& a, const B& b) {
    if (a > b) {
        a = b;
        return true;
    } return false;
}
inline void fileIO(const string& Task = "") {
    ios::sync_with_stdio(false); cin.tie(NULL);
    if (fopen((Task + ".inp").c_str(), "r")) {
        freopen((Task + ".inp").c_str(), "r", stdin);
        freopen((Task + ".out").c_str(), "w", stdout);
    }
}

/* Author: Hoang Quoc Viet */

/** END OF TEMPLATE **/

int n, m, k, q;
int dp[80][80][80], cost[80][80][80], tmp[80][80];

int main() {
    fileIO("main");

    cin >> n >> m;
    memset(cost, 0x3f, sizeof cost);
    FOR(i, 1, n) cost[0][i][i] = cost[1][i][i] = 0;
    FOR(i, 1, m) {
        int u, v, t;
        cin >> u >> v >> t;
        ckmin(cost[1][u][v], t);
    }
    cin >> k >> q;
    ckmin(k, n - 1);
    FOR(i, 2, k) {
        memset(tmp, 0x3f, sizeof tmp);
        FOR(x, 1, n) FOR(y, 1, n) FOR(z, 1, n) {
            ckmin(tmp[y][z], cost[i-1][y][x] + cost[1][x][z]);
        }
        FOR(y, 1, n) FOR(z, 1, n) {
            cost[i][y][z] = min(cost[i-1][y][z], tmp[y][z]);
        }
    }
    while (q --) {
        int u, v;
        cin >> u >> v;
        if (cost[k][u][v] >= 1e9) cout << "-1\n";
        else cout << cost[k][u][v] << "\n";
    }
    return 0;
}

/*** VOI VOI VOI important things must be said three times :> ***/

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void fileIO(const string&)':
Main.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen((Task + ".inp").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen((Task + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25
• Subtask 4: 15 / 15