Submission #982582

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
982582	2024-05-14 12:50:42	JooDdae	전압 (JOI14_voltage)	C++17	100 / 100	83 ms	22680 KiB

voltage

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int n, m, col[100100], chk[200200];
vector<array<int, 2>> v[100100], odd, even;
int in[100100], out[100100], t[200200], cnt;
void dfs(int u, int p, int pid, int c) {
    col[u] = c, in[u] = ++cnt;
    for(auto [x, id] : v[u]) if(!chk[id]) {
        chk[id] = 1;
        if(col[x] == -1) {
            dfs(x, u, id, c^1);
            continue;
        }
        if(col[x] != c) even.push_back({u, x});
        else odd.push_back({u, x});
    }
    out[u] = ++cnt;
}
void update(int b, int c) {
    while(b <= 2*n) t[b] += c, b += b & -b;
}
 
 
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Compilation message (stderr)

voltage.cpp: In function 'int main()':
voltage.cpp:51:55: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for(int i=2;i<=n;i++) if(find(in[i])-find(out[i]) == odd.size()) cnt++;
      |                              ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 35 / 35
• Subtask 4: 45 / 45