Submission #520718

#	Time	Username	Problem	Language	Result	Execution time	Memory
520718		peti1234	Split the Attractions (IOI19_split)	C++17	11 / 100	70 ms	12572 KiB

split

#include <bits/stdc++.h>

using namespace std;
int n, m, db[4];
vector<int> valasz, el[100000];

void dfs(int a, int ert) {
    if (!db[ert]) return;
    valasz[a]=ert;
    db[ert]--;
    for (auto x:el[a]) {
        if (!valasz[x]) {
            dfs(x, ert);
        }
    }
}

vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> q) {
    int m=p.size();
    db[1]=a, db[2]=b, db[3]=c;
    for (int i=0; i<m; i++) {
        int x=p[i], y=q[i];
        el[x].push_back(y), el[y].push_back(x);
    }
    valasz.resize(n);

    // 2
    if (a==1) {
        dfs(0, 2);
        for (int i=0; i<n; i++) {
            if (!valasz[i]) {
                if (db[1]) {
                    valasz[i]=1;
                    db[1]--;
                } else {
                    valasz[i]=3;
                    db[3]--;
                }
            }
        }
        return valasz;
    }

    // 1
    for (int i=0; i<n; i++) {
        if (el[i].size()==1) {
            if (db[1]) {
                dfs(i, 1);
            } else {
                dfs(i, 2);
            }
        }
        for (int i=0; i<n; i++) {
            if (!valasz[i]) {
                valasz[i]=3;
                db[3]--;
            }
        }
        return valasz;
    }
}

Compilation message (stderr)

split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:61:1: warning: control reaches end of non-void function [-Wreturn-type]
   61 | }
      | ^

• Subtask 1: 0 / 7
• Subtask 2: 11 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36