Submission #1145820

#	Time	Username	Problem	Language	Result	Execution time	Memory
1145820		imarn	Cheap flights (LMIO18_pigus_skrydziai)	C++20	28 / 100	3097 ms	82860 KiB

pigus_skrydziai

#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC target("avx2")
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define plx pair<ll,int>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vvi vector<vi>
#define pp pair<ll,int>
#define ub(x,i) upper_bound(all(x),i)-x.begin()
#define lb(x,i) lower_bound(all(x),i)-x.begin()
#define t3 tuple<int,int,int>
using namespace std;
const int mxn=3e5+5,k=710;
multiset<pair<int,ll>>ms[mxn];
ll dp[mxn]{0},ans=0;
int idx[mxn]{0};
tuple<int,int,int> rd[2*mxn];
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n,m;cin>>n>>m;
    for(int i=1;i<=m;i++){
        int a,b,c;cin>>a>>b>>c;
        ms[a].insert({b,c});
        ms[b].insert({a,c});
        dp[a]+=c;dp[b]+=c;
        ans=max({ans,dp[a],dp[b]});
        rd[i]={a,b,c};
    }
    for(int i=1;i<=m;i++){
        int u,v,w;tie(u,v,w)=rd[i];
        if(ms[u].size()>ms[v].size())swap(u,v);
        for(auto [it,ix]:ms[u]){
            auto ij = ms[v].lower_bound({it,0});
            if(ij->f==it)ans=max(ans,w+ix+ij->s);
        }
    }cout<<ans;
}

• Subtask 1: 12 / 12
• Subtask 2: 0 / 25
• Subtask 3: 16 / 16
• Subtask 4: 0 / 47