Submission #1121417

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121417		ezzzay	September (APIO24_september)	C++17	Compilation error	0 ms	0 KiB

september

#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
const int MN=1e6+5;
vector<int>v[MN];
bool vis[MN];
int par[MN];
void dfs(int a){
	vis[a]=1;
	for(auto b:v[a]){
		if(vis[b]==1)continue;
		dfs(b);
	}
}
 
int solve(int N, int M, std::vector<int> F, std::vector<std::vector<int>> S) {
	for(int i=0;i<N;i++){
		v[i].clear();
		vis[i]=0;
	}
	for(int i=1;i<N;i++){
		par[i]=F[i];
		v[F[i]].pb(i);
	}
	int k=0;
	for(auto a:S[0]){
		if(vis[a]==0){
			k++;
			dfs(a);
		}
	}
	return k;
	
	
}
void taskcase() {
	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);
}

int main() {
	int T=1;
	while(T--) taskcase();
	return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccVj6RDM.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccPkVUYO.o:september.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status