Submission #833941

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
833941	2023-08-22 09:39:44	josanneo22	Two Currencies (JOI23_currencies)	C++17	28 / 100	189 ms	42940 KiB

currencies

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#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ld long double
#define mp make_pair
#define pb push_back
#define pii pair<int,int>
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define ar array
const int N=1e5+500,K=25;
int cnt = 0, cur = 0, tin[N], tout[N], sp[N][K];
vector<pair<int,int>> g[N];
int dep[N], w[N];
void dfs(int u, int p){
    tin[u] = cur++;
    sp[u][0] = p;
    for(int i = 1; i < K; i++)
        sp[u][i] = sp[sp[u][i-1]][i-1];
    for(auto x : g[u]){
        if(x.fi == p) continue;
        dep[x.fi] = dep[u]+w[x.se];
        dfs(x.fi,u);
    }
    tout[u] = cur++;
}
bool is_anc(int u, int v){
    return (tin[u] <= tin[v] && tout[v] <= tout[u]);
 
 
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Compilation message (stderr)

currencies.cpp: In function 'int main()':
currencies.cpp:74:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   74 |      freopen("input.txt","r",stdin);
      |      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
currencies.cpp:75:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |      freopen("output.txt","w",stdout);
      |      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 28 / 28
• Subtask 3: 0 / 30
• Subtask 4: 0 / 32