Submission #1184302

#	Time	Username	Problem	Language	Result	Execution time	Memory
1184302		pensive	Friend (IOI14_friend)	C++20	Compilation error	0 ms	0 KiB

friend

#include <iostream>
#include <algorithm>
#include <vector>
#include <algorithm>

using namespace std;
#define ll long long
#define REP(a,i,n) for (int i=a;i<n;i++)
#define f first
#define s second

void iayf(int n, int i, int host, vector<vector<int>> &adjList) {
    adjList[host].push_back(i);
    adjList[i].push_back(host);
}
void mfayf(int n, int i, int host, vector<vector<int>> &adjList) {
    for (auto j : adjList[host]) {
        adjList[j].push_back(i);
        adjList[i].push_back(j);
    }
}
void wayf(int n, int i, int host, vector<vector<int>> &adjList) {
    mfayf(n,i,host,adjList);
    iayf(n, i, host, adjList);
}
int maxSample(int n, int i, vector<vector<int>> &adjList, vector<int> &includes, int confidence[]) {
    if (i==n) {
        return 0;
    }
    int cleared=0;
    for (auto j : adjList[i]) {
        cleared += includes[j];
    }
    int ans= maxSample(n,i+1,adjList,includes,confidence);
    if (cleared==0) {
        includes[i]=1;
        ans = max(ans, confidence[i]+maxSample(n,i+1,adjList,includes,confidence));
        includes[i]=0;
    }
    return ans;
}

int findSample(int n, int confidence[], int host[], int protocol[]) {
    vector<vector<int> > adjList(n);
    REP(1,i,n) {
        if (protocol[i]==0) iayf(n,i,host[i],adjList);
        else if (protocol[i]==1) mfayf(n,i,host[i],adjList);
        else if (protocol[i]==2) wayf(n,i,host[i],adjList);
    }
    vector<int> includes(n, 0);
    return maxSample(n,1,adjList,includes,confidence);
} 

int main() {
    int n=6;
    int confidence[n] = {13, 3, 6, 20, 10, 15}, host[n] = {0, 0,  0,  1,  2,  0}, protocol[n] = {0, 0, 1, 2, 1, 0};
    cout << findSample(n,confidence,host,protocol);
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccBYH7RT.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccpO1Mn0.o:friend.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status