Submission #427001

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
4270012021-06-14 11:43:42lycPort Facility (JOI17_port_facility)C++14
22 / 100
6014 ms45252 KiB
#include <bits/stdc++.h>
using namespace std;
#define TRACE(x) cerr << #x << " :: " << x << endl
#define _ << " " <<
#define SZ(x) ((int)(x).size())
#define ALL(x) (x).begin(),(x).end()
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define RFOR(i,a,b) for(int i=(a);i>=(b);--i)
typedef long long ll;
typedef pair<int,int> ii;
const int MN = 1e6+5;
const int mod = 1e9+7;
int N;
ii C[MN];
ll ans;
vector<int> al[MN];
int col[MN];
void dfs(int u, int c) {
if (!ans) return;
col[u] = c;
for (int& v : al[u]) {
if (col[v] == -1) dfs(v,!c);
else if (col[v] != !c) ans = 0;
}
 
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