Submission #443981

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
443981	2021-07-12 18:45:49	aryan12	Pipes (BOI13_pipes)	C++17	65 / 100	231 ms	32472 KiB

pipes

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#include <bits/stdc++.h>
using namespace std;
#define int long long
mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());
const int N = 1e5 + 5;
int change[N], result[N];
vector<pair<int, int> > g[N];
int edgeChange[N];
int n, m;
void dfs(int node, int par, int edgeNum) {
  for(int i = 0; i < g[node].size(); i++) {
    if(g[node][i].first != par) {
      dfs(g[node][i].first, node, g[node][i].second);
    }
  }
  int netWithParent = change[node] - result[node];
  if(par != -1) {
    result[node] += netWithParent;
    edgeChange[edgeNum] = netWithParent;
    result[par] += netWithParent;
  }
}
void Tree() {
  dfs(1, -1, -1);
  if(result[1] != change[1]) {
    cout << "0\n";
 
 
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Compilation message (stderr)

pipes.cpp: In function 'void dfs(long long int, long long int, long long int)':
pipes.cpp:14:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |  for(int i = 0; i < g[node].size(); i++) {
      |                 ~~^~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 35 / 70