제출 #53375

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
53375		kriii	즐거운 사진 수집 (JOI13_collecting)	C++17	100 / 100	1558 ms	267180 KiB

collecting

#include <stdio.h>

const int Z = 1<<20;
int N,M,B[2][Z*2];
long long base,C[2][20];

void in(int k, int x)
{
	x += Z;
	B[k][x] = 3 - B[k][x];
	x /= 2;
	int l = 0;
	while (x){
		if (B[k][x] != 3) C[k][l]--;
		B[k][x] = B[k][x*2] | B[k][x*2+1];
		if (B[k][x] != 3) C[k][l]++;
		x /= 2; l++;
	}
}

int main()
{
	scanf ("%d %d",&N,&M);
	for (int i=0;i<=N;i++) base += 1ll << (2 * i);
	for (int k=0;k<2;k++){
		for (int i=0;i<Z*2;i++) B[k][i] = 1;
		for (int i=0;i<N;i++) C[k][i] = (1 << (N - i - 1));
	}

	while (M--){
		int k,x; scanf ("%d %d",&k,&x); x--;
		in(k,x);

		long long ans = base;
		for (int i=0;i<N;i++) ans -= C[0][i] * C[1][i] * 4;
		printf ("%lld\n",ans);
	}

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

collecting.cpp: In function 'int main()':
collecting.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d %d",&N,&M);
  ~~~~~~^~~~~~~~~~~~~~~
collecting.cpp:31:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int k,x; scanf ("%d %d",&k,&x); x--;
            ~~~~~~^~~~~~~~~~~~~~~

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