Submission #872666

#	Time	Username	Problem	Language	Result	Execution time	Memory
872666		HossamHero7	Autobus (COCI22_autobus)	C++14	55 / 70	1088 ms	194180 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'
int edge[71][71];
vector<pair<int,ll>> adj[71];
ll dp[71][71][70*70+1];
ll solve(int i,int j,int k){
    if(k == 0) return i == j ? 0 : 1e18;
    ll &ret = dp[i][j][k];
    if(~ret) return ret;
    ret = solve(i,j,k-1);
    for(auto [ch,c] : adj[i]) ret = min(ret,solve(ch,j,k-1)+c);
    return ret;
}
void solve(){
    int n,m;
    cin>>n>>m;
    for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) edge[i][j] = 1e9;
    for(int i=0;i<m;i++){
        int a,b,c;
        cin>>a>>b>>c;
        edge[a][b] = min(edge[a][b] , c);
    }
    int cnt = 0;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++) {
            if(edge[i][j] != 1e9) adj[i].push_back({j,edge[i][j]}) , cnt++;
        }
    }
    int k,q;
    cin>>k>>q;
    k = min(k,cnt);
    memset(dp,-1,sizeof(dp));
    while(q--){
        int a,b;
        cin>>a>>b;
        ll ans = solve(a,b,k);
        cout<<(ans == 1e18 ? -1 : ans)<<endl;
    }
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);      cout.tie(0);
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'll solve(int, int, int)':
Main.cpp:13:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   13 |     for(auto [ch,c] : adj[i]) ret = min(ret,solve(ch,j,k-1)+c);
      |              ^

• Subtask 1: 15 / 15
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25
• Subtask 4: 0 / 15