제출 #1306683

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1306683		jwpassion1	친구 (IOI14_friend)	C++20	컴파일 에러	0 ms	0 KiB

friend

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;

vector<int> graph[100000];
int trust[100000], pro[100000], host[100000];
int dp[100000][2][2];

void dfs(int node) {
    dp[node][1][0] = dp[node][1][1] = trust[node];
    for (int i : graph[node]) {
        dfs(i);
        int tdp[2][2];
        for (int i1 = 0; i1 < 2; i1++) for (int j1 = 0; j1 < 2; j1++) tdp[i1][j1] = dp[node][i1][j1] + dp[i][0][0];
        int idp = max(max(dp[i][0][1], dp[i][1][0]), dp[i][1][1]);

        if (!pro[i]) tdp[0][0] = max(tdp[0][0], dp[node][0][0] + idp);
        else if (pro[i] == 1) {
            tdp[0][1] = max(tdp[0][1], max(dp[node][0][0], dp[node][0][1]) + idp);
            tdp[1][1] = max(tdp[1][1], max(dp[node][1][0], dp[node][1][1]) + idp);
        }
        else tdp[0][1] = max(tdp[0][1], dp[node][0][0] + idp);

        for (int i1 = 0; i1 < 2; i1++) for (int j1 = 0; j1 < 2; j1++) dp[node][i1][j1] = tdp[i1][j1];
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;
    for (int i = 0; i < n; i++) cin >> trust[i];

    for (int i = 1; i < n; i++) {
        cin >> host[i] >> pro[i];
        graph[host[i]].push_back(i);
    }

    for (int i = 0; i < n; i++) sort(graph[i].rbegin(), graph[i].rend());

    dfs(0);
    cout << max(max(dp[0][0][0], dp[0][0][1]), max(dp[0][1][0], dp[0][1][1])) << '\n';
}

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/cctp3aNX.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc2GYXiv.o:friend.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cctp3aNX.o:(.bss+0x61aa0): multiple definition of `host'; /tmp/cc2GYXiv.o:(.bss+0x186a00): first defined here
/usr/bin/ld: /tmp/cctp3aNX.o: in function `main':
grader.cpp:(.text.startup+0xe5): undefined reference to `findSample(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status