oj.uz

답안 #427566

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
427566 2021-06-14T17:16:08 Z davi_bart Power Plant (JOI20_power) C++17
0 / 100
 9 ms 9748 KB 
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll
#define fi first
#define se second
#define ld long double
#define pb push_back
int N;
string c;
vector<int> v[200010],p[200010];
void dfs(int pos,int prec,int good){
    if(good!=-1 && c[pos]=='1'){
        p[good].pb(pos);
    }
    if(c[pos]=='1')good=pos;
    for(int x:v[pos]){
        if(x==prec)continue;
        dfs(x,pos,good);
    }
}
int ans(int pos,int prec){
    vector<int> k={0};
    int tot=0;
    for(int x:v[pos]){
        if(x==prec)continue;
        k.pb(ans(x,pos));
        tot+=k.back();
    }
    sort(k.begin(),k.end(),greater<int> ());
    int ma;
    if(c[pos]=='1'){
        if(k[0]<=1)k[0]++;
        ma=max(k[0],tot-1);
    }else{
        ma=tot;
    }
    //cout<<pos<<" "<<ma<<endl;
    return ma;
}
signed main(){
	ios::sync_with_stdio(false);cin.tie(0);
    cin>>N;
    for(int i=0;i<N-1;i++){
        int a,b;
        cin>>a>>b;
        a--;b--;
        v[a].pb(b);
        v[b].pb(a);
    }
    cin>>c;
    cout<<ans(0,-1)<<endl;
}

Subtask #1
0.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 9748 KB Output is correct
2 Correct 8 ms 9676 KB Output is correct
3 Correct 7 ms 9676 KB Output is correct
4 Correct 7 ms 9624 KB Output is correct
5 Incorrect 7 ms 9720 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 9748 KB Output is correct
2 Correct 8 ms 9676 KB Output is correct
3 Correct 7 ms 9676 KB Output is correct
4 Correct 7 ms 9624 KB Output is correct
5 Incorrect 7 ms 9720 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 9748 KB Output is correct
2 Correct 8 ms 9676 KB Output is correct
3 Correct 7 ms 9676 KB Output is correct
4 Correct 7 ms 9624 KB Output is correct
5 Incorrect 7 ms 9720 KB Output isn't correct
6 Halted 0 ms 0 KB -