Submission #1158804

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1158804	2025-02-27 13:44:43	CodeLakVN	Regions (IOI09_regions)	C++20	0 / 100	340 ms	36108 KiB

regions

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#include <bits/stdc++.h>
using namespace std;
#define task "REGIONS"
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FOD(i, a, b) for (int i = (a); i >= (b); i--)
const int N = (int)2e5 + 5;
int BLOCK;
int numNode, numQuery, numRegions;
int region[N];
vector<int> adj[N];
int timer = 0;
int in[N], out[N];
vector<pair<int, int>> employee[N];
void dfs(int u, int p) {
    in[u] = ++timer;
    employee[region[u]].push_back({in[u], u});
    for (int v : adj[u]) if (v != p) 
        dfs(v, u);
    out[u] = timer;
}
int id[25005];
int ans[500][25005];
void prepare(int u, int p, int curRegion, int counter) {
 
 
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Compilation message (stderr)

regions.cpp: In function 'int main()':
regions.cpp:49:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
regions.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 85