oj.uz

Submission #894923

# Submission time Handle Problem Language Result Execution time Memory
894923 2023-12-29T08:42:08 Z vjudge1 Zagrade (COI17_zagrade) C++11
10 / 100
 133 ms 31468 KB 
#include <bits/stdc++.h>
#define pb push_back
#define pf push_front
using namespace std;
#define F first
#define S second
typedef long long ll;
#define pii pair <int, int>
#define pll pair <ll, ll>
typedef long double ld;
const ll N = 3 * 1e5 + 10;
const ll mod = 1e9 + 7;

ll um(ll a, ll b){
	return ((1LL * a * b) % mod + mod) % mod;
}
ll subr(ll a, ll b){
	return ((1LL * a - b) % mod + mod) % mod;
}
ll add(ll a, ll b){
	return (1LL * a + b) % mod;
}
ll binpow(ll x, ll step){
	ll res = 1LL;
	while(step){
		if(step & 1) res = um(res, x);
		x = um(x, x);
		step /= 2;
	}
	return res;
}
vector <int> q[N];
bool arr[N];
int ans, n;
void over(){
	int cur = 0, cnt = 1, plus = 0;
	map<int, int> mp;
	for(int i = 1; i <= n; i++){
		if(arr[i]){
			plus++;
			if(plus == 1) mp[cur + plus] = 1 + mp[cur];
			else mp[cur + plus]++;
		} else{
			plus = 0;
			cur++;
			ans += mp[cur];
		}
	}
	cur = plus = 0;
	cnt = 1;
	map<int, int> mp1;
	for(int i = n; i >= 1; i--){
		if(arr[i]){
			plus++;
			if(plus == 1) mp1[cur + plus] = 1 + mp1[cur];
			else mp1[cur + plus]++;
		} else{
			plus = 0;
			cur++;
			ans += mp1[cur];
		}
	}
}
void dfs(int v, int p, int cnt){
	if(cnt == 0) ans++;
	for(auto u : q[v]){
		if(u == p) continue;
		if(arr[u]) dfs(u, v, cnt + 1);
		else{
			if(cnt > 0) dfs(u, v, cnt - 1);
		}
	}
}
void subtask1(){
	for(int i = 1; i <= n; i++){
		if(arr[i] == true) dfs(i, -1, 1);
	}
}
int main() {
	ios::sync_with_stdio(false);
  	cin.tie(NULL);
	string s;
  	cin >> n >> s;
  	for(int i = 0; i < n; i++){
  		if(s[i] == '(') arr[i + 1] = true;
  	}
  	for(int i = 0, a, b; i < n - 1; i++){
  		cin >> a >> b;
  		q[a].pb(b);
  		q[b].pb(a);
  	}
  	if(n <= 1000){
  		subtask1();
  	} else over();
	cout << ans;
  return 0;
}

Compilation message

zagrade.cpp: In function 'void over()':
zagrade.cpp:36:15: warning: variable 'cnt' set but not used [-Wunused-but-set-variable]
   36 |  int cur = 0, cnt = 1, plus = 0;
      |               ^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 7512 KB Output is correct
2 Correct 5 ms 7516 KB Output is correct
3 Correct 5 ms 7664 KB Output is correct
4 Correct 3 ms 7768 KB Output is correct
5 Correct 5 ms 7516 KB Output is correct
6 Correct 5 ms 7516 KB Output is correct
7 Correct 5 ms 7664 KB Output is correct
8 Correct 3 ms 7516 KB Output is correct
9 Correct 4 ms 7648 KB Output is correct
10 Correct 4 ms 7516 KB Output is correct

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 133 ms 31468 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 7512 KB Output is correct
2 Correct 5 ms 7516 KB Output is correct
3 Correct 5 ms 7664 KB Output is correct
4 Correct 3 ms 7768 KB Output is correct
5 Correct 5 ms 7516 KB Output is correct
6 Correct 5 ms 7516 KB Output is correct
7 Correct 5 ms 7664 KB Output is correct
8 Correct 3 ms 7516 KB Output is correct
9 Correct 4 ms 7648 KB Output is correct
10 Correct 4 ms 7516 KB Output is correct
11 Incorrect 133 ms 31468 KB Output isn't correct
12 Halted 0 ms 0 KB -