Submission #1203206

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203206		quocbaoo	Ceste (COCI17_ceste)	C++20	32 / 160	75 ms	2628 KiB

ceste

#include<bits/stdc++.h>
#define ll long long
#define fi first
#define se second
using namespace std;
ll dp[2004],kq[2004];
struct Node{
    int fi,se,ba;
};
vector<Node> g[2004];
int main(){
    if (fopen("nrsubsecv.in","r")){
        freopen("nrsubsecv.in","r",stdin);
        freopen("nrsubsecv.out","w",stdout);
    }
    int n,m;cin>>n>>m;
    for (int i=1;i<=m;i++){
        int u,v,t,c;cin>>u>>v>>t>>c;
        g[u].push_back({v,t,c});g[v].push_back({u,t,c});
    }
    set<tuple<int,int,int>> st;
    memset(dp,0x3f,sizeof(dp));memset(kq,0x3f,sizeof(kq));
    st.insert({0,0,1});dp[1]=0;
    while (!st.empty()){
        auto [time,cost,bd]=*st.begin();st.erase(st.begin());
        kq[bd]=min(kq[bd],1LL*time*cost);
        // cout<<bd<<" "<<time<<" "<<cost<<endl;
        for (auto j:g[bd]){
            if (cost+j.ba>dp[j.fi]) continue;
            st.insert({time+j.se,cost+j.ba,j.fi});
            dp[j.fi]=cost+j.ba;
        }
    }
    for (int i=2;i<=n;i++) {
        if (kq[i]>=1e15) cout<<"-1"<<endl;else cout<<kq[i]<<endl;
    }
}

Compilation message (stderr)

ceste.cpp: In function 'int main()':
ceste.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         freopen("nrsubsecv.in","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
ceste.cpp:14:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         freopen("nrsubsecv.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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