oj.uz

Submission #714878

# Submission time Handle Problem Language Result Execution time Memory
714878 2023-03-25T11:36:09 Z Ahmed57 Zagrade (COI17_zagrade) C++14
30 / 100
 471 ms 41836 KB 
#include <bits/stdc++.h>

using namespace std;
#define int long long
long long sz[300007];long long all = 0;
long long vis[300007];
vector<int> adj[300007];
int ss = 0;
long long zz[300007];
string s;
long long bra = 0;
long long c = 0;
long long ch = 0;
void calc(int no,int pr){
    if(ss==0){
        if(s[no-1]=='('){bra++;ch--;ch=max(ch,0LL);}
        if(s[no-1]==')'){bra--;ch++;}
        if(bra>=0&&ch==0)zz[bra]++;
    }else if(ss==1){
        if(s[no-1]=='('){bra++;ch++;}
        if(s[no-1]==')'){bra--;ch--;ch=max(ch,0LL);}
        if(bra<=0&&ch==0){
            all+=zz[-bra];
        }
        //if(bra==0&&ch==0)c++;
    }else{
        if(s[no-1]=='('){bra++;ch--;ch=max(ch,0LL);}
        if(s[no-1]==')'){bra--;ch++;}
        if(bra>=0&&ch==0)zz[bra]--;
    }
    for(auto i:adj[no]){
        if(i==pr||vis[i])continue;
        calc(i,no);
    }
}
int dfs(int no,int pr){
    sz[no] = 1;
    for(auto i:adj[no]){
        if(i==pr||vis[i]!=0)continue;
        sz[no]+=dfs(i,no);
    }
    return sz[no];
}
int get_centroid(int no,int ss,int pr){
    for(auto i:adj[no]){
        if(pr==i||vis[i]!=0)continue;
        if(sz[i]*2>ss){
            return get_centroid(i,ss,no);
        }
    }
    return no;
}
void centroid(int no){
    int cen = get_centroid(no,dfs(no,-1),-1);
    for(int i = 0;i<=max(1000LL,sz[cen]+5);i++){
        zz[i] = 0;
    }
    zz[0] = 1;
    vis[cen] = 1;
    for(auto i:adj[cen]){
        if(vis[i])continue;
        ss= 0;
        ch = 0;
        bra = 0;
        calc(i,-1);
    }
    if(s[cen-1]==')')all+=zz[1];
    for(auto i:adj[cen]){
        if(vis[i])continue;
        ss = 2;
        ch =0 , bra = 0;
        calc(i,-1);
        ss = 1;
        ch = (s[cen-1]=='('?1:0);
        bra = (s[cen-1]=='('?1:-1);
        calc(i,-1);
        //cout<<all<<" "<<i<<endl;
        bra = 0;
        ch = 0;
        ss = 0;
        calc(i,-1);
    }
    for(auto i:adj[cen]){
        if(vis[i])continue;
        centroid(i);
    }
}
signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int n;
    cin>>n>>s;
    for(int i = 0;i<n-1;i++){
        int a,b;
        cin>>a>>b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    centroid(1);
    cout<<all<<endl;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 7356 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 471 ms 41716 KB Output is correct
2 Correct 422 ms 41600 KB Output is correct
3 Correct 459 ms 41636 KB Output is correct
4 Correct 443 ms 41836 KB Output is correct
5 Correct 469 ms 41696 KB Output is correct
6 Correct 461 ms 41696 KB Output is correct
7 Correct 468 ms 41660 KB Output is correct
8 Correct 457 ms 41716 KB Output is correct
9 Correct 455 ms 41660 KB Output is correct
10 Correct 381 ms 41696 KB Output is correct
11 Correct 357 ms 41672 KB Output is correct

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 7356 KB Output isn't correct
2 Halted 0 ms 0 KB -