Submission #1009742

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009742		Cookie	Road Closures (APIO21_roads)	C++14	0 / 100	2065 ms	26068 KiB

roads

#include<bits/stdc++.h>
#include<fstream>
using namespace std;
#define sz(a) (int)a.size()
#define ALL(v) v.begin(), v.end()
#define ALLR(v) v.rbegin(), v.rend()
#define ll long long
#define pb push_back
#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 ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#define mpp make_pair
//#define int long long
typedef unsigned long long ull;
//const int x[4] = {0, 0, 1, -1};
//const int y[4] = {1, -1, 0, 0};
const int mxn = 2e5 + 5;
const ll mod = 998244353, mod2 = 1e9 + 1977, inf = 1e17 + 1;
struct E{
    int u, v, w;
};
vt<E>edge[mxn + 1];
vt<int>node;
int n;
int deg[mxn + 1];
vt<pll>adj[mxn + 1];
vt<ll>ans;
bool vis[mxn + 1];
int dfs(int s, int need){
    vis[s] = 1;
    int sus = deg[s] - need;
    for(auto [i, w]: adj[s]){
        if(!vis[i]){
            sus -= dfs(i, need);
        }
    }
    if(sus <= 0)return(0);
    ans[need] += sus; 
    return(1);
}
std::vector<long long> minimum_closure_costs(int N, std::vector<int> U,
                                             std::vector<int> V,
                                             std::vector<int> W) {
    n = N;
    bool ok = 1;
    ans.resize(n, 0);
    for(int i = 0; i < n - 1; i++){
        U[i]++; V[i]++;
        ok &= (U[i] == 1);
        adj[U[i]].pb(mpp(V[i], W[i])); adj[V[i]].pb(mpp(U[i], W[i])); deg[U[i]]++; deg[V[i]]++;
    }
    for(int i = 0; i < n - 1; i++){
        for(int j = min(deg[U[i]], deg[V[i]]) - 1; j >= 0; j--){
            edge[j].pb({U[i], V[i], W[i]}); node.pb(U[i]); node.pb(V[i]);
        }
    }
    for(int i = 0; i < n; i++){
        for(auto [u, v, w]: edge[i]){
            //cout << i << " " << u << " " << v << " " << w << "\n";
            adj[u].pb(mpp(v, w)); adj[v].pb(mpp(u, w)); 
        }
        for(auto u: node){
            if(vis[u] == 0){
                dfs(u, i);
            }
        }
        for(auto u: node){
            adj[u].clear(); vis[u] = 0;
        }
    }
    return(ans);
}
/*
int main() {
  int N;
  assert(1 == scanf("%d", &N));
 
  std::vector<int> U(N - 1), V(N - 1), W(N - 1);
  for (int i = 0; i < N - 1; ++i) {
    assert(3 == scanf("%d %d %d", &U[i], &V[i], &W[i]));
  }
 
  std::vector<long long> closure_costs = minimum_closure_costs(N, U, V, W);
  for (int i = 0; i < static_cast<int>(closure_costs.size()); ++i) {
    if (i > 0) {
      printf(" ");
    }
    printf("%lld",closure_costs[i]);
  }
  printf("\n");
  return 0;
}
*/

Compilation message (stderr)

roads.cpp: In function 'int dfs(int, int)':
roads.cpp:38:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   38 |     for(auto [i, w]: adj[s]){
      |              ^
roads.cpp: In function 'std::vector<long long int> minimum_closure_costs(int, std::vector<int>, std::vector<int>, std::vector<int>)':
roads.cpp:64:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   64 |         for(auto [u, v, w]: edge[i]){
      |                  ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 14
• Subtask 4: 0 / 10
• Subtask 5: 0 / 17
• Subtask 6: 0 / 25
• Subtask 7: 0 / 22