Submission #145309

#	Time	Username	Problem	Language	Result	Execution time	Memory
145309		arayi	Zagrade (COI17_zagrade)	C++17	100 / 100	1238 ms	71508 KiB

zagrade

#include <iostream>
#include <string>
#include <queue>
#include <stack>
#include <algorithm>
#include <math.h>
#include <vector>
#include <cstring>
#include <ctime>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <ctime>
#define fr first
#define sc second
#define MP make_pair
#define PB push_back
#define fastio ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define lli long long int
#define y1 arayikhalatyan
using namespace std;

lli gcd(lli a, lli b) {
	if (b == 0)
		return a;
	return gcd(b, a % b);
}
lli cg(lli n) {
	return n ^ (n >> 1);
}
lli SUM(lli a)
{
	return (a * (a + 1) / 2);
}
bool CAN(int x, int y, int n, int m)
{
	if (x >= 0 && y >= 0 && x < n && y < m)
	{
		return true;
	}
	return false;
}
double her(double x1, double y1, double x2, double y2)
{
	return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
}
string strsum(string a, string b)
{
	int p = 0;
	string c;
	reverse(a.begin(), a.end());
	reverse(b.begin(), b.end());
	if (b.length() < a.length())
	{
		for (int i = b.length(); i < a.length(); i++)
		{
			b += "0";
		}
	}
	else
	{
		for (int i = a.length(); i < b.length(); i++)
		{
			a += "0";
		}
	}

	a += "0", b += "0";
	for (int i = 0; i < a.length(); i++)
	{
		c += (a[i] - '0' + b[i] - '0' + p) % 10 + '0';
		p = (a[i] + b[i] - '0' - '0' + p) / 10;
	}
	if (c[c.length() - 1] == '0') c.erase(c.length() - 1, 1);
	reverse(c.begin(), c.end());
	return c;
}
string strmin(string a, string b)
{
	if (a.length() > b.length()) return b;
	if (b.length() > a.length()) return a;
	for (int i = 0; i < a.length(); i++)
	{
		if (a[i] > b[i]) return b;
		if (b[i] > a[i]) return a;
	}
	return a;
}

char vow[] = { 'a', 'e', 'i', 'o', 'u' };
int dx[] = { 1, -1, 0, 0 };
int dy[] = { 0, 0, 1, -1 };



const int N = 1e6 + 30;
const lli mod = 1000000007;
int mn(int a, int b)
{
	if (a < b) return a;
	return b;
}
int n, sm;
string s;
vector <int> g[N];
bool col[N];
int qan[N];
queue <int> h;
lli nerq[2 * N], ver[2 * N];
lli pat;
vector <int> ss;
void dfsqan(int v, int par)
{
	qan[v] = 1;
	for (auto p : g[v])
	{
		if (p != par && !col[p])
		{
			dfsqan(p, v);
			qan[v] += qan[p];
		}
	}
}

void dfshashvv(int v, int par, int min, int val)
{
	if (s[v - 1] == '(')
	{
		val++;
		min = mn(1, min + 1);
		if (min >= 0) ver[val + N]++, ss.PB(val + N);
	}
	else min = mn(-1, min - 1), val--;

	for (auto p : g[v])
	{
		if (p != par && !col[p])
		{
			dfshashvv(p, v, min, val);
		}
	}
}
void dfshashvn(int v, int par, int min, int val)
{
	if (s[v - 1] == '(') val++;
	else
	{
		val--;
		if (val <= min)  nerq[N + val]++, ss.PB(N + val);
		min = mn(val, min);
	}
	//cout << v << "_" << val << endl;
	for (auto p : g[v])
	{
		if (p != par && !col[p])
		{
			dfshashvn(p, v, min, val);
		}
	}
}
void dfspatn(int v, int par, int min, int val)
{
	if (s[v - 1] == '(') val++;
	else
	{
		val--;
		if (val <= min)  pat += ver[N - val];
		min = mn(val, min);
	}
	for (auto p : g[v])
	{
		if (p != par && !col[p])
		{
			dfspatn(p, v, min, val);
		}
	}
}
void dfspatv(int v, int par, int min, int val)
{
	if (s[v - 1] == '(')
	{
		val++;
		min = mn(1, min + 1);
		if (min >= 0) pat += nerq[N - val];
	}
	else min = mn(-1, min - 1), val--;
	for (auto p : g[v])
	{
		if (p != par && !col[p])
		{
			dfspatv(p, v, min, val);
		}
	}
}
void dfsc(int v, int par)
{
	bool flag = true;
	for (auto p : g[v])
	{
		if (p != par && !col[p])
		{
			if (qan[p] > sm)
			{
				dfsc(p, v);
				flag = false;
			}
		}
	}
	if (flag)
	{
		//cout << v << " ";
		col[v] = true;
		int val, min;
		if (s[v - 1] == '(') val = 1, min = 0;
		else val = -1, min = -1, nerq[N - 1]++, ss.PB(N - 1);
		for (auto p : g[v])
		{
			if (!col[p])
			{
				h.push(p);
				dfspatn(p, v, min, val);
				dfspatv(p, v, 0, 0);
				dfshashvn(p, v, min, val);
				dfshashvv(p, v, 0, 0);
			}
		}
		pat += nerq[N];
		if (val == 1) pat += ver[N - 1];
		for (auto p : ss) nerq[p] = 0, ver[p] = 0;
		ss.clear();
		//cout << pat << endl;
	}
}
int main()
{
	fastio;
	cin >> n >> s;
	for (int i = 0; i < n - 1; i++)
	{
		int a, b;
		cin >> a >> b;
		g[a].PB(b);
		g[b].PB(a);
	}
	h.push(1);
	while (!h.empty())
	{
		int k = h.front();
		h.pop();
		//cout << "k-" << k << endl;
		dfsqan(k, -1);
		sm = qan[k] / 2;
		dfsc(k, -1);
	}
	cout << pat;
	return 0;
}

Compilation message (stderr)

zagrade.cpp: In function 'std::__cxx11::string strsum(std::__cxx11::string, std::__cxx11::string)':
zagrade.cpp:57:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = b.length(); i < a.length(); i++)
                            ~~^~~~~~~~~~~~
zagrade.cpp:64:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = a.length(); i < b.length(); i++)
                            ~~^~~~~~~~~~~~
zagrade.cpp:71:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < a.length(); i++)
                  ~~^~~~~~~~~~~~
zagrade.cpp: In function 'std::__cxx11::string strmin(std::__cxx11::string, std::__cxx11::string)':
zagrade.cpp:84:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < a.length(); i++)
                  ~~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 30 / 30
• Subtask 3: 60 / 60