Submission #914246

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
914246	2024-01-21 12:33:32	VMaksimoski008	Regions (IOI09_regions)	C++14	100 / 100	2437 ms	29960 KiB

regions

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#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
 
const int maxn = 2e5 + 5;
 
int n, r, q, in[maxn], out[maxn], timer = 0, B = 320, curr = 0, dp[320][25001], i, r1, r2, ans;
short home[maxn], id[maxn];
vector<int> graph[maxn];
vector<pii> by_home[25001];
 
void dfs(int u) {
    in[u] = timer++;
    for(int &v : graph[u])
        dfs(v);
    out[u] = timer;
}
 
void dfs2(int u, int R, int cnt) {
    if(home[u] == R) cnt++;
    dp[id[R]][home[u]] += cnt;
    for(int &v : graph[u]) dfs2(v, R, cnt);
}
 
int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
 
    cin >> n >> r >> q;
 
 
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Compilation message (stderr)

regions.cpp: In function 'int32_t main()':
regions.cpp:47:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 |         if(by_home[i].size() <= B) continue;
      |            ~~~~~~~~~~~~~~~~~~^~~~
regions.cpp:56:31: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   56 |         if(by_home[r1].size() > B) {
      |            ~~~~~~~~~~~~~~~~~~~^~~

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