Submission #370601

#	Time	Username	Problem	Language	Result	Execution time	Memory
370601		CodePlatina	Designated Cities (JOI19_designated_cities)	C++17	7 / 100	328 ms	32620 KiB

designated_cities

#include <iostream>
#include <algorithm>
#include <vector>
#include <utility>
#include <tuple>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define piii pair<int, pii>
#define plll pair<long long, pll>
#define tiii tuple<int, int, int>
#define tiiii tuple<int, int, int, int>
#define tlll tuple<long long, long long, long long>
#define tllll tuple<long long, long long, long long, long long>
#define ff first
#define ss second
#define ee ss.ff
#define rr ss.ss
#define DEBUG
using namespace std;

vector<tiii> gph[202020];
long long mx;
long long sz[202020];

void dfs(int x, int p)
{
    for(auto [y, a, b] : gph[x]) if(y != p) dfs(y, x), sz[x] += b + sz[y];
}

void dfs2(int x, int p, long long d)
{
    mx = max(mx, d);
    for(auto [y, a, b] : gph[x]) if(y != p) dfs2(y, x, d + a - b);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n; cin >> n;
    long long ans = 0;
    for(int i = 1; i < n; ++i)
    {
        int x, y, a, b; cin >> x >> y >> a >> b; --x; --y;
        gph[x].push_back({y, a, b});
        gph[y].push_back({x, b, a});
        ans += a, ans += b;
    }

    dfs(0, -1);
    dfs2(0, -1, sz[0]);

//    cout << sz[0] << endl;

    int T; cin >> T;
    while(T--)
    {
        int x; cin >> x;
        cout << ans - mx;
    }
}

• Subtask 1: 0 / 6
• Subtask 2: 7 / 7
• Subtask 3: 0 / 9
• Subtask 4: 0 / 17
• Subtask 5: 0 / 17
• Subtask 6: 0 / 44