Submission #1124097

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124097		ljtunas	Autobus (COCI22_autobus)	C++20	70 / 70	306 ms	248172 KiB

Main

// author : anhtun_hi , nqg
// 25-26.12.2024

#include <bits/stdc++.h>
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define reset(h, v)    memset(h, v, sizeof h)
#define Forv(i, a)     for(auto& i : a)
#define For(i, a, b)   for(int i = a; i <= b; ++i)
#define Ford(i, a, b)  for(int i = a; i >= b; --i)
#define c_bit(i)     __builtin_popcountll(i)
#define Bit(mask, i)    ((mask >> i) & 1LL)
#define onbit(mask, i)  ((mask) bitor (1LL << i))
#define offbit(mask, i) ((mask) &~ (1LL << i))
#define Log2(x) (63 - __builtin_clzll(x))
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
using namespace std;

using ll = long long;
using ii = pair<ll, ll>;
using db = long double;
using ull = unsigned long long;

namespace std {
    template <typename T, int D>
    struct _vector : public vector <_vector <T, D - 1>> {
        static_assert(D >= 1, "Dimension must be positive!");
        template <typename... Args>
        _vector(int n = 0, Args... args) : vector <_vector <T, D - 1>> (n, _vector <T, D - 1> (args...)) {}
    };
    template <typename T> struct _vector <T, 1> : public vector <T> {
        _vector(int n = 0, const T& val = T()) : vector <T> (n, val) {}
    };
    template <class A, class B> bool minimize(A &a, B b){return a > b ? a = b, true : false;}
    template <class A, class B> bool maximize(A &a, B b){return a < b ? a = b, true : false;}
}
const int dx[] = {0, 0, +1, -1}, dy[] = {-1, +1, 0, 0}, LOG = 20, base = 311, inf = 1e9 + 5;
const int MAXN = 70 + 5;
const  ll  mod = 1e9 + 7;
const  ll   oo = 1e18;

#define int long long

int n, m, k, q;
ll w[MAXN][MAXN], dp[MAXN][MAXN][MAXN * MAXN];

void Solve() {
    cin >> n >> m;
    For(i, 0, 74)For(j, 0, 74) w[i][j] = oo;
    For(i, 0, 74)For(j, 0, 74) For(cc, 0, 74 * 74) dp[i][j][cc] = oo;
    For(i, 1, m){
        int u, v; ll c;
        cin >> u >> v >> c;
        minimize(w[u][v], c);
        minimize(dp[u][v][1], c);
    }
    For(i, 1, n) w[i][i] = 0, dp[i][i][0] = 0;
    cin >> k >> q;
    For(d, 2, min(k, n))
    For(a, 1, n) For(b, 1, n)For(c, 1, n){
        minimize(dp[a][b][d], dp[a][c][d - 1] + w[c][b]);
    }
    while (q--){
        int u, v;
        cin >> u >> v;
        ll ans = oo;
        For(i, 0, min(k, n)) minimize(ans, dp[u][v][i]);
        if(ans == oo) ans = -1;
        cout << ans << '\n';
    }
}

signed main() {
    cin.tie(0) -> sync_with_stdio(0);
    if(fopen("a.inp", "r")) {
        freopen("a.inp", "r", stdin);
        freopen("a.out", "w", stdout);
    }

    int t = 1;
//    cin >> t;
    while(t --) Solve();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:77:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |         freopen("a.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
Main.cpp:78:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |         freopen("a.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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