제출 #22868

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
22868		dried chocochip on Daegu asphalt (#40)	Young Zebra (KRIII5_YZ)	C++11	2 / 7	119 ms	23092 KiB

YZ

#include<bits/stdc++.h>

using namespace std;

int n, m;
char mmap[400][400];
int cc[400][400], c_idx;
bool visited[400][400];
int cc_sz[400*400+2];
int di[4] = {-1, 0, 1, 0};
int dj[4] = {0, 1, 0, -1};

int mod(int val, int m)
{
	while(val < 0)
		val += m*m*m;
	return val%m;
}

int si, sj;
bool cc_inf[400*400+2];
map<pair<int,int>, int> mm;

void dfs(int i, int j)
{
	int ii = mod(i, n), jj = mod(j, m);
	visited[ii][jj] = true;
	cc[ii][jj] = c_idx;
	cc_sz[c_idx]++;

	if(i >= 0 && i < n && j >= 0 && j < m)
		mm[{i,j}] = 1;

	for(int k = 0; k < 4; k++)
	{
		int ni = i+di[k], nj = j+dj[k];
		int nii = mod(ni, n), njj = mod(nj, m);

		if(!visited[nii][njj] && mmap[ii][jj] == mmap[nii][njj])
			dfs(ni, nj);
	}

}

bool visited2[400][400];

void dfs2(int i, int j)
{
	int ii = mod(i, n), jj = mod(j, m);
	visited2[ii][jj] = true;

	for(int k = 0; k < 4; k++)
	{
		int ni = i+di[k], nj = j+dj[k];
		int nii = mod(ni, n), njj = mod(nj, m);

		if(!(ni >= 0 && ni < n && nj >= 0 && nj < m))
			if(mm.count({nii,njj}) != 0)
				cc_inf[c_idx] = true;
		if(!visited2[nii][njj] && mmap[ii][jj] == mmap[nii][njj])
			dfs2(ni, nj);
	}
}

int main()
{
	scanf("%d %d", &n, &m);
	for(int i = 0; i < n; i++)
		for(int j = 0; j < m; j++)
			scanf(" %c", &mmap[i][j]);

	for(int i = 0; i < n; i++)
		for(int j = 0; j < m; j++)
			if(!visited[i][j])
			{
				si = i, sj = j;
				c_idx++;

				mm.clear();
				dfs(i, j);
				dfs2(i, j);
			}

	for(int i = 0; i < n; i++)
	{
		for(int j = 0; j < m; j++)
			printf("%d ", cc_inf[cc[i][j]] ? -1 : cc_sz[cc[i][j]]);
		printf("\n");
	}
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

YZ.cpp: In function 'int main()':
YZ.cpp:67:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
                        ^
YZ.cpp:70:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf(" %c", &mmap[i][j]);
                             ^

• Subtask 1: 2 / 7