Submission #872320

#	Time	Username	Problem	Language	Result	Execution time	Memory
872320		Ahmed_Solyman	Autobus (COCI22_autobus)	C++14	0 / 70	221 ms	524288 KiB

Main

/*
In the name of Allah
made by: Ahmed_Solyman
*/
#include <bits/stdc++.h>
#include <ext/rope>
 
using namespace std;
using namespace __gnu_cxx;
#pragma GCC optimize("-Ofast")
#pragma GCC optimize("-O1")
//-------------------------------------------------------------//
typedef long long ll;
typedef unsigned long long ull;
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define PI acos(-1)
#define lb lower_bound
#define ub upper_bound
#define endl '\n'
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define sum_to(n) (n*(n+1))/2
#define pb push_back
#define pf push_front
#define fil(arr,x) memset(arr,x,sizeof(arr))
const ll mod=1e9+7;
int dx[8]={0,1,0,-1,1,1,-1,-1};
int dy[8]={1,0,-1,0,1,-1,-1,1};
//-------------------------------------------------------------//
ll lcm(ll a,ll b)
{
    return (max(a,b)/__gcd(a,b))*min(a,b);
}
void person_bool(bool x)
{
    cout<<(x?"YES":"NO")<<endl;
}
int main()
{
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    #ifndef ONLINE_JUDGE
    freopen("input.in", "r", stdin);
    freopen("output.out", "w", stdout);
    #endif
    fast
    int n,m;cin>>n>>m;
    vector<vector<vector<int>>>dist(n+5,vector<vector<int>>(n+5,vector<int>(n+5,1e9)));
    for(int i=0;i<m;i++){
        int u,v,w;
        cin>>u>>v>>w;
        dist[u][v][1]=min(dist[u][v][1],w);
    }
    int k,q;cin>>k>>q;
    for(int j=2;j<=min(k,n);j++){
        for(int u=1;u<=n;u++){
            for(int v=1;v<=n;v++){
                for(int b=1;b<=n;b++){
                    dist[u][v][j]=min(dist[u][v][j],dist[u][b][j-1]+dist[b][v][j-1]);
                }
            }
        }
    }
    while(q--){
        int u,v;cin>>u>>v;
        cout<<(u==v?0:dist[u][v][k]==1e9?-1:dist[u][v][k])<<endl;
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:43:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     freopen("input.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:44:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     freopen("output.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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