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Submission #66370

# Submission time Handle Problem Language Result Execution time Memory
66370 2018-08-10T10:32:30 Z yusufake Zagrade (COI17_zagrade) C++
100 / 100
 1343 ms 69100 KB 
#include<bits/stdc++.h> 
using namespace std; 

#define mp make_pair 
#define pb push_back 
#define st first 
#define nd second 

typedef long long ll; 
typedef pair < int , int > pp; 
const int mod = 1e9 + 7; 
const int N   = 3e5 + 5; 

vector < int > V[N];
int sz[N],U[N],T[N+N],A[N],C,n,i,x,y;
char s[N];
ll ans;

void f(int x, int p, int n){
    sz[x] = 1; int h=1;
    for(auto y : V[x]){
        if(U[y] || y == p) continue;
        f(y,x,n);
        sz[x] += sz[y];
        if(sz[y] > n/2) h=0;
    }
    if(h && n-sz[x] <= n/2) C=x;
}

vector < int > v[N];
int node;
void g(int x, int p, int t, int mn, int mx){
    sz[x] = 1; 
    t += A[x];
    mn = min(mn , t);
    mx = max(mx , t);
    if(!node && t == mx && A[x] == 1) ans += T[t];
    if(node && t == mn && t <= 0) { v[node].pb(-t); T[-t]++; }
    for(auto y : V[x]){
        if(U[y] || y == p) continue;
        g(y,x,t,mn,mx);
        sz[x] += sz[y];
    }
}

void slv(int x, int n){
    f(x,0,n);
    x = C;
    U[x] = 1;
    if(A[x] == -1) T[1]++;
    for(auto y : V[x]){
        if(U[y]) continue;
        node = y;
        g(y,x,A[x],A[x],A[x]);
    }
    node = 0;
    if(A[x] == 1) ans += T[0];
    for(auto y : V[x]){
        if(U[y]) continue;
        for(auto t : v[y]) T[t]--;
        g(y,x,0,0,0);
        for(auto t : v[y]) T[t]++;
    }
    
    if(A[x] == -1) T[1]--;
    for(auto y : V[x]){
        if(U[y]) continue;
        for(auto t : v[y]) T[t]--;
        v[y].clear();
    }
    
    //cout << x << " " << ans << " ss\n";
    //exit(0);
    for(auto y : V[x]) if(!U[y]) slv(y,sz[y]);
}


int main(){
    scanf("%d %s",&n,s+1);
    for(i=1;i<=n;i++) A[i] = s[i] == '(' ? 1 : -1;
    for(i=2;i<=n;i++){
        scanf("%d%d",&x,&y);
        V[x].pb(y); V[y].pb(x);
    }
    
    slv(1,n);
    printf("%lld",ans);
    return 0;
}

Compilation message

zagrade.cpp: In function 'int main()':
zagrade.cpp:79:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %s",&n,s+1);
     ~~~~~^~~~~~~~~~~~~~~~
zagrade.cpp:82:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&x,&y);
         ~~~~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 14456 KB Output is correct
2 Correct 14 ms 14592 KB Output is correct
3 Correct 14 ms 14664 KB Output is correct
4 Correct 15 ms 14700 KB Output is correct
5 Correct 16 ms 14700 KB Output is correct
6 Correct 14 ms 14872 KB Output is correct
7 Correct 15 ms 14872 KB Output is correct
8 Correct 15 ms 14872 KB Output is correct
9 Correct 14 ms 14872 KB Output is correct
10 Correct 14 ms 14872 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 495 ms 56752 KB Output is correct
2 Correct 550 ms 69100 KB Output is correct
3 Correct 504 ms 69100 KB Output is correct
4 Correct 553 ms 69100 KB Output is correct
5 Correct 499 ms 69100 KB Output is correct
6 Correct 519 ms 69100 KB Output is correct
7 Correct 482 ms 69100 KB Output is correct
8 Correct 481 ms 69100 KB Output is correct
9 Correct 487 ms 69100 KB Output is correct
10 Correct 465 ms 69100 KB Output is correct
11 Correct 562 ms 69100 KB Output is correct

Subtask #3
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 14456 KB Output is correct
2 Correct 14 ms 14592 KB Output is correct
3 Correct 14 ms 14664 KB Output is correct
4 Correct 15 ms 14700 KB Output is correct
5 Correct 16 ms 14700 KB Output is correct
6 Correct 14 ms 14872 KB Output is correct
7 Correct 15 ms 14872 KB Output is correct
8 Correct 15 ms 14872 KB Output is correct
9 Correct 14 ms 14872 KB Output is correct
10 Correct 14 ms 14872 KB Output is correct
11 Correct 495 ms 56752 KB Output is correct
12 Correct 550 ms 69100 KB Output is correct
13 Correct 504 ms 69100 KB Output is correct
14 Correct 553 ms 69100 KB Output is correct
15 Correct 499 ms 69100 KB Output is correct
16 Correct 519 ms 69100 KB Output is correct
17 Correct 482 ms 69100 KB Output is correct
18 Correct 481 ms 69100 KB Output is correct
19 Correct 487 ms 69100 KB Output is correct
20 Correct 465 ms 69100 KB Output is correct
21 Correct 562 ms 69100 KB Output is correct
22 Correct 1341 ms 69100 KB Output is correct
23 Correct 1248 ms 69100 KB Output is correct
24 Correct 1334 ms 69100 KB Output is correct
25 Correct 1343 ms 69100 KB Output is correct
26 Correct 537 ms 69100 KB Output is correct
27 Correct 645 ms 69100 KB Output is correct
28 Correct 573 ms 69100 KB Output is correct
29 Correct 559 ms 69100 KB Output is correct
30 Correct 502 ms 69100 KB Output is correct
31 Correct 160 ms 69100 KB Output is correct
32 Correct 623 ms 69100 KB Output is correct