Submission #702675

#	Time	Username	Problem	Language	Result	Execution time	Memory
702675		jhnah917	Designated Cities (JOI19_designated_cities)	C++14	7 / 100	213 ms	33976 KiB

designated_cities

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int N, Q;
vector<pair<ll,ll>> G[202020];
ll Sum, C[202020], C1;

void TreeDP(int v, int b=-1, ll up=0, ll dw=0){
    for(auto [i,w] : G[v]) if(i == b) C1 += w, up += w;
    C[v] = dw - up;
    for(auto [i,w] : G[v]) if(i != b) TreeDP(i, v, up, dw+w);
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(nullptr);
    cin >> N;
    for(int i=1; i<N; i++){
        int a, b, c, d; cin >> a >> b >> c >> d; Sum += c + d;
        G[a].emplace_back(b, c); G[b].emplace_back(a, d);
    }
    cin >> Q; assert(Q == 1);
    TreeDP(1);
    for(int q=1; q<=Q; q++){
        int t; cin >> t; assert(t == 1);
        cout << Sum - (C1 + *max_element(C+1, C+N+1)) << "\n";
    }
}

Compilation message (stderr)

designated_cities.cpp: In function 'void TreeDP(int, int, ll, ll)':
designated_cities.cpp:10:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   10 |     for(auto [i,w] : G[v]) if(i == b) C1 += w, up += w;
      |              ^
designated_cities.cpp:12:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   12 |     for(auto [i,w] : G[v]) if(i != b) TreeDP(i, v, up, dw+w);
      |              ^

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