Submission #1235971

#	Time	Username	Problem	Language	Result	Execution time	Memory
1235971		lechaa	Poklon (COCI17_poklon7)	C++20	114 / 120	535 ms	166864 KiB

poklon

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define int long long

vector<vector<int>> g;
vector<int> v;

void dfs(int k, int p){
    for(int y = 0; y < g[k].size(); y++){
        dfs(g[k][y], k);
    }
    if(p == -1) return;
    v[p] = max(v[k]+1, v[p]);
}

void dfs1(int k){
    for(int y = 0; y < g[k].size(); y++){
        v[g[k][y]] = v[k]-1;
        dfs1(g[k][y]);
    }
}

main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n; cin >> n;
    g.resize(n+1);
    v.resize(n+1);
    vector<vector<int>> sv(n+1);
    for(int i = 1; i <= n; i++){
        int a, b; cin >> a >> b;
        if(a > 0){
            g[i].push_back(a);
        }else{
            sv[i].push_back(abs(a));
        }
        if(b > 0){
            g[i].push_back(b);
        }else{
            sv[i].push_back(abs(b));
        }
    }
    dfs(1, -1);
    dfs1(1);
    int low = 0;
    int top = 1e9*2;
    int ans = 0;
    vector<int> p(32);
    int c = 1;
    for(int y = 0; y <= 31; y++){
        p[y] = c;
        c *= 2;
    }
    while(low <= top){
        int mid = (low + top)/2;
        bool gg = true;
        for(int i = 0; i <= n; i++){
            for(int y = 0; y < sv[i].size(); y++){
                if(sv[i][y] > mid * p[min(30LL, v[i])]){
                    gg = false;
                }
            }
        }
        if(gg){
            ans = mid;
            top = mid-1;
        }else{
            low = mid+1;
        }
    }
    int j = ans;
    if(j == 0){
        cout << j << "\n";
        return 0;
    }
    string ns = "";
    while(j > 0){
        if(j%2 == 1){
            ns += '1';
        }else{
            ns += '0';
        }
        j/=2;
    }
    reverse(ns.begin(), ns.end());
    j = v[1]+1;
    while(j--){
        ns += '0';
    }
    cout << ns << "\n";
    return 0;
}

Compilation message (stderr)

poklon.cpp:24:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   24 | main(){
      | ^~~~

• Subtask 1: 114 / 120