Submission #1202195

#	Time	Username	Problem	Language	Result	Execution time	Memory
1202195		ismoilmirzouz	September (APIO24_september)	C++20	Compilation error	0 ms	0 KiB

september

#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for (int i=a; i<b; i++)

int solve(int N, int M, std::vector<int> F, std::vector<std::vector<int>> S) {
	// cout<<"f"<<endl;
	int n = N, m = M;
	vector<int> adj[n+1];
	rep(i, 1, n) {
		adj[F[i]].push_back(i+1);
	}
	vector<int> dp(n+1, -1);
	rep(j,0,m){
		rep(i,0,n-1){
			dp[S[j][i]] = max(dp[S[j][i]], i);
		}
	}
	function<void(int, int)> dfs = [&](int u, int p) {
		for (auto v: adj[u]){
			if (v == p) continue;
			dfs(v, u);
			dp[u] = max(dp[u], dp[v]);
		}
	};
	dfs(1, 0);
	int ans = 0;
	int nxt = -1;
	rep(i, 0, n-1){
		// cout<<i<<" "<<nxt<<endl;
		if (i > nxt){
			ans++;
		}
		nxt = max(dp[S[0][i]],nxt);
	}
	return ans;
}

int main() {
	int T;
	cin>>T;
	while(T--){
		int N, M;
		cin>>N>>M;
		std::vector<int> F(N);
		F[0] = -1;
		for (int i = 1; i < N; ++i)
			cin>>F[i];
		
		std::vector<std::vector<int>> S(M, std::vector<int>(N - 1));
		for (int i = 0; i < M; ++i)
			for (int j = 0; j < N - 1; ++j)
				cin>>S[i][j];
		
		cout<<solve(N, M, F, S)<<endl;
	}
	return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc4ZBQ94.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccvboDPJ.o:september.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status