Submission #986342

#	Time	Username	Problem	Language	Result	Execution time	Memory
986342		VMaksimoski008	Toll (BOI17_toll)	C++17	0 / 100	414 ms	524288 KiB

toll

#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
//#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

int32_t main() {
    ios_base::sync_with_stdio(false);
    cout.tie(0); cin.tie(0);

    int K, n, m, q;
    cin >> K >> n >> m >> q;

    auto node = [&](int i, int j) { return K * i + j; };
    auto id = [&](int x) { return pii{ x / K, x % K }; }; 

    ll dp[n/K+1][K+1][n/K+1][K+1];
    for(int i=0; i<=n/K; i++)
        for(int j=0; j<=K; j++)
            for(int k=0; k<=n/K; k++)
                for(int l=0; l<=K; l++) dp[i][j][k][l] = 1e9;

    for(int i=0; i<=n/K; i++)
        for(int j=0; j<=K; j++) dp[i][j][i][j] = 0;

    for(int i=0; i<m; i++) {
        int a, b, t;
        cin >> a >> b >> t;
        dp[a/K][a%K][b/K][b%K] = min(dp[a/K][a%K][b/K][b%K], (ll)t); 
    }

    //compute dp in increasing dist
    for(int d=2; d<=n/K; d++) {
        for(int i=0; i+d<=n/K; i++) {
            for(int j=0; j<K; j++) {
                for(int k=0; k<K; k++) {
                    if(node(i+d, k) > n) break;
                    for(int a=i+1; a<i+d; a++) {
                        for(int b=0; b<K; b++) {
                            dp[i][j][i+d][k] = min(dp[i][j][i+d][k], dp[i][j][a][b] + dp[a][b][i+d][k]);
                        }
                    }
                }
            }
        }
    }

    while(q--) {
        int a, b;
        cin >> a >> b;
        cout << (dp[a/K][a%K][b/K][b%K] == 1e9 ? -1 : dp[a/K][a%K][b/K][b%K]) << '\n';
    }

    return 0;
}

Compilation message (stderr)

toll.cpp: In function 'int32_t main()':
toll.cpp:29:10: warning: variable 'id' set but not used [-Wunused-but-set-variable]
   29 |     auto id = [&](int x) { return pii{ x / K, x % K }; };
      |          ^~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 31
• Subtask 5: 0 / 44