Submission #66305

#	Time	Username	Problem	Language	Result	Execution time	Memory
66305		ekrem	Zagrade (COI17_zagrade)	C++98	0 / 100	24 ms	3572 KiB

zagrade

#include <bits/stdc++.h>
#define st first
#define nd second
#define mp make_pair
#define pb push_back
#define sol (k+k)
#define sag (k+k+1)
#define orta ((bas+son)>>1)
#define N 1000005
using namespace std;

int n, ans, a[N], pre[N];
char s[N];
map < int , int > h;

int main() {
	// freopen("in.txt", "r", stdin);
	// freopen("out.txt", "w", stdout);
	scanf("%d %s",&n, s + 1);
	for(int i = 1; i <= n; i++){
		a[i] = (s[i] == '(') ? 1 : -1;
		pre[i] = pre[i - 1] + a[i];
		// cout << pre[i] << " ";
	}

	// up(1, -n, n, 0);
	h[0]++;
	h[pre[1]]++;
	// up(1, -n, n, pre[1]);

	for(int i = 2; i <= n; i++){
		ans += h[pre[i]];
		h[pre[i]]++;
	}
	printf("%d\n",ans);
	return 0;
}

Compilation message (stderr)

zagrade.cpp: In function 'int main()':
zagrade.cpp:19:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %s",&n, s + 1);
  ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 30
• Subtask 3: 0 / 60