Submission #213623

#	Time	Username	Problem	Language	Result	Execution time	Memory
213623		SamAnd	Cheap flights (LMIO18_pigus_skrydziai)	C++17	100 / 100	1453 ms	85244 KiB

pigus_skrydziai

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
const int N = 500005;

int n, m;
vector<pair<int, int> > a[N];
map<pair<int, int>, int> mp;

int main()
{
    scanf("%d%d", &n, &m);
    for (int i = 0; i < m; ++i)
    {
        int x, y, z;
        scanf("%d%d%d", &x, &y, &z);
        a[x].push_back(m_p(z, y));
        a[y].push_back(m_p(z, x));
        mp[m_p(x, y)] = z;
        mp[m_p(y, x)] = z;
    }
    long long ans = 0;
    for (int x = 1; x <= n; ++x)
    {
        long long yans = 0;
        for (int i = 0; i < a[x].size(); ++i)
        {
            yans += a[x][i].first;
        }
        ans = max(ans, yans);
    }
    for (int x = 1; x <= n; ++x)
    {
        sort(a[x].begin(), a[x].end());
        reverse(a[x].begin(), a[x].end());
        if (a[x].size() >= 2 && mp.find(m_p(a[x][0].second, a[x][1].second)) != mp.end())
            ans = max(ans, a[x][0].first + 0LL + a[x][1].first + mp[m_p(a[x][0].second, a[x][1].second)]);
    }
    printf("%lld\n", ans);
    return 0;
}

Compilation message (stderr)

pigus_skrydziai.cpp: In function 'int main()':
pigus_skrydziai.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i < a[x].size(); ++i)
                         ~~^~~~~~~~~~~~~
pigus_skrydziai.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
pigus_skrydziai.cpp:16:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d", &x, &y, &z);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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