Submission #43190

#	Time	Username	Problem	Language	Result	Execution time	Memory
43190		baactree	즐거운 사진 수집 (JOI13_collecting)	C++14	0 / 100	5077 ms	40332 KiB

collecting

#include <bits/stdc++.h>
using namespace std;
int n, q;
int r[21][1<<20], c[21][1<<20];
int rs[1 << 21], cs[1 << 21];
int ro[1 << 20], co[1 << 20];
void update(int idx, int val, int *tree) {
	idx+=2;
	while (idx < 1 << 21) {
		tree[idx] += val;
		idx += idx&(-idx);
	}
}
int query(int idx, int *tree) {
	int ret = 0;
	idx+=2;
	while (idx) {
		ret += tree[idx];
		idx -= idx&(-idx);
	}
	return ret;
}
int main() {
	scanf("%d%d", &n, &q);
	int cnt = 0;
	for (int i = 1; i <= n; i++) 
		r[i][0] = c[i][0] = 1 << (n - i);
	while (q--) {
		int a, b;
		scanf("%d%d", &a, &b);
		b--;
		if (a) {
			//col

			for (int i = 1; i <= n; i++) {
				int d = 1 << i;
				int idx = b / d;
				int le = idx*d;
				int ri = (idx + 1)*d - 1;
				int pre = query(ri, cs) - query(le - 1, cs);
				c[i][pre]--;
				update(b, co[b] ? -1 : 1, cs);
				co[b] ^= 1;
				int now = query(ri, cs) - query(le - 1, cs);
				c[i][now % (1 << i)]++;
				int k = 0;
				if (pre == 0)k = 1;
				else if (now == 0)k = -1;
				cnt += r[i][0]*k;
				update(b, co[b] ? -1 : 1, cs);
				co[b] ^= 1;
			}
			update(b, co[b] ? -1 : 1, cs);
			co[b] ^= 1;
		}
		else {
			//row
			for (int i = 1; i <= n; i++) {
				int d = 1 << i;
				int idx = b / d;
				int le = idx*d;
				int ri = (idx + 1)*d - 1;
				int pre = query(ri, rs) - query(le - 1, rs);
				r[i][pre]--;
				update(b, ro[b] ? -1 : 1, rs);
				ro[b] ^= 1;
				int now = query(ri, rs) - query(le - 1, rs);
				r[i][now % (1 << i)]++;
				int k = 0;
				if (pre == 0)k = 1;
				else if (now == 0)k = -1;
				cnt += c[i][0] * k;
				update(b, ro[b] ? -1 : 1, rs);
				ro[b] ^= 1;
			}
			update(b, ro[b] ? -1 : 1, rs);
			ro[b] ^= 1;
		}
		printf("%d\n", cnt * 4 + 1);
	}
	return 0;
}

Compilation message (stderr)

collecting.cpp: In function 'int main()':
collecting.cpp:24:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &q);
                       ^
collecting.cpp:30:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d", &a, &b);
                        ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 70