Submission #676050

#	Time	Username	Problem	Language	Result	Execution time	Memory
676050		Cookie	Cheap flights (LMIO18_pigus_skrydziai)	C++14	16 / 100	1395 ms	35268 KiB

pigus_skrydziai

#include<bits/stdc++.h>
 
#include<fstream>
 
using namespace std;
ifstream fin("talent.in");
ofstream fout("talent.out");
#define ll long long
#define vt vector
#define pb push_back
#define fi first
#define se second
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define pii pair<int, int>
#define pll pair<ll, ll>
//#define int long long
typedef unsigned long long ull;
const int mxn = 3e5 + 3;
int n, m;
ll c[mxn + 1];
struct e{
    ll u, v, w;
};
vt<e>edge;
vt<pii>adj[mxn + 1];
signed main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    forr(i, 0, m){
        int u, v; cin >> u >> v; ll w; cin >> w;
        adj[u].pb({v, w}); adj[v].pb({u, w});
        edge.pb({u, v, w});
        c[u] += w; c[v] += w;
    }
    ll ans  =0;
    forr(i, 1, n + 1)ans = max(ans, c[i]);
    // triangle
    for(auto [u, v, w]: edge){
        bool swapp = adj[u].size() > adj[v].size();
        if(swapp)swap(adj[u], adj[v]);
        for(auto [t, e]: adj[u]){
            int id = lower_bound(adj[v].begin(), adj[v].end(), make_pair(t, -1)) - adj[v].begin();
            if(id != adj[v].size() && adj[v][id].fi == t){
                //cout << u << " " << v  << " " << t << "\n";
                ans = max(ans, e + w + adj[v][id].se);
            }
        }
        if(swapp)swap(adj[u], adj[v]);
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

pigus_skrydziai.cpp: In function 'int main()':
pigus_skrydziai.cpp:40:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   40 |     for(auto [u, v, w]: edge){
      |              ^
pigus_skrydziai.cpp:43:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   43 |         for(auto [t, e]: adj[u]){
      |                  ^
pigus_skrydziai.cpp:45:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |             if(id != adj[v].size() && adj[v][id].fi == t){
      |                ~~~^~~~~~~~~~~~~~~~

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