Zero Game

input/code.cpp: In function 'int main()':
input/code.cpp:8:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", s);
                ^
input/code.cpp:26:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &tt);
                  ^
input/code.cpp:28:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &d);
                  ^

#include <bits/stdc++.h>
using namespace std;
char s[1000020];
int a[1000020], c, n;
int b[1000020];
int q[1000020], l, r, d;
int main() {
	scanf("%s", s);
	int n = strlen(s);
	s[n++] = '1';
	int zero = 0, szero = 0;
	for (int i = 0; i < n; i++) {
		if (s[i] == '0') {
			zero++;
			szero++;
		} else {
			a[c++] = zero;
			zero = 0;
		}
	}
	for (int i = 0; i < c; i++) {
		a[i]--;
		b[i + 1] = b[i] + a[i];
	}
	int tt;
	scanf("%d", &tt);
	for (int _ = 0; _ < tt; _++) {
		scanf("%d", &d);
		l = r = 0;
		int ans = min(d, szero);
		for (int i = 0; i <= c; i++) {
			while (l < r) {
				if (b[i] < b[q[r - 1]]) {
					r--;
				} else {
					break;
				}
			}
			q[r++] = i;
			if (i - q[l] > d + 1) {
				l++;
			}
			ans = max(ans, b[i] - b[q[l]] + d + 1);
		}
		ans = min(ans, szero);
		printf("%d\n", ans);
	}
	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED