Submission #384834

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
384834	2021-04-02 11:30:53	kostia244	Designated Cities (JOI19_designated_cities)	C++17	100 / 100	757 ms	87816 KiB

designated_cities

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#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define int long long
const int maxn = 4e5 + 12;
int n, cst[2*maxn];
ll edgesum = 0;
vector<array<int, 2>> g[maxn];
ll sub[maxn];
void sub_cost(int v, int p) {
    sub[v] = 0;
    for(auto [i, id] : g[v]) if(i != p) {
        sub_cost(i, v);
        sub[v] += sub[i] + cst[id];
    }
}
ll arb[maxn];
void reroot_cost(int v, int p, ll sum) {
    arb[v] = sum;
    for(auto [i, id] : g[v]) if(i!=p) {
        reroot_cost(i, v, sum-cst[id]+cst[id^1]);
    }
}
ll greedy[maxn], used[maxn];
array<ll, 2> find_leaf(int v, int p) {
    array<ll, 2> ans = {0, v};
    for(auto [i, id] : g[v]) if(i != p) {
        auto t = find_leaf(i, v);
 
 
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Compilation message (stderr)

designated_cities.cpp: In function 'int main()':
designated_cities.cpp:175:19: warning: unused variable 'x' [-Wunused-variable]
  175 |     for(int f, t, x, y, i = 1; i < n; i++) {
      |                   ^
designated_cities.cpp:175:22: warning: unused variable 'y' [-Wunused-variable]
  175 |     for(int f, t, x, y, i = 1; i < n; i++) {
      |                      ^

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