mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
118 lines
3.2 KiB
C++
118 lines
3.2 KiB
C++
#include<cstdio>
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#include<iostream>
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#include<cstring>
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#include<string>
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#include<algorithm>
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#include<map>
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#include<set>
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#include<vector>
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#include<queue>
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#include<cstdlib>
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#include<ctime>
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#include<cmath>
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#include<bitset>
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using namespace std;
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#define N 210
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#define inf 50000000
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int dir[8][2] = { { 0, 1 }, { 1, 1 }, { 1, 0 }, { 1, -1 }, { 0, -1 },
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{ -1, -1 }, { -1, 0 }, { -1, 1 } };
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int T = 1, n, m, idx, tot;
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int maz[N][N], done[N * N], ans[N * N];
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char Map[N][N];
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struct position {
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int x, y;
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} u, v, qu[N * N];
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void bfs(int x, int y) {
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maz[x][y] = idx;
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Map[x][y] = '0';
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u.x = x;
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u.y = y;
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int l = 0, r = 1;
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qu[0] = u;
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while (l < r) {
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u = qu[l++];
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for (int i = 0; i < 8; i++) {
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v.x = u.x + dir[i][0];
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v.y = u.y + dir[i][1];
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if (v.x >= 1 && v.x <= n && v.y >= 1 && v.y <= m
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&& Map[v.x][v.y] == '1') {
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maz[v.x][v.y] = idx;
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Map[v.x][v.y] = '0';
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qu[r++] = v;
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}
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}
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}
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if (r < 5)
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done[idx] = 1;
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}
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void solve(int x, int y) {
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u.x = x;
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u.y = y;
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int i = 1, to = 6;
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qu[0] = u;
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for (;;) {
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int flag = 0;
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for (int j = to; j != to || !flag; j = (j + 1) % 8) {
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if (j == to)
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flag = 1;
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v.x = u.x + dir[j][0];
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v.y = u.y + dir[j][1];
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if (v.x >= 1 && v.x <= n && v.y >= 1 && v.y <= m
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&& maz[v.x][v.y] == maz[x][y]) {
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u.x = u.x + dir[(j + 7) % 8][0];
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u.y = u.y + dir[(j + 7) % 8][1];
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for (j = 0; j < 8; j++) {
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if (v.x + dir[j][0] == u.x && v.y + dir[j][1] == u.y) {
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to = j;
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break;
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}
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}
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qu[i++] = v;
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u = v;
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if (i >= 4 && qu[0].x == qu[i - 2].x && qu[0].y == qu[i - 2].y
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&& qu[1].x == qu[i - 1].x && qu[1].y == qu[i - 1].y) {
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ans[tot++] = i - 2;
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return;
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}
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break;
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}
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}
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}
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}
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int main() {
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while (~scanf("%d%d", &n, &m)) {
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if (!n && !m)
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break;
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for (int i = 1; i <= n; i++)
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scanf("%s", Map[i] + 1);
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idx = 0;
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memset(maz, 0, sizeof(maz));
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for (int i = 1; i <= n; i++) {
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for (int j = 1; j <= m; j++) {
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if (Map[i][j] == '1') {
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idx++;
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done[idx] = 0;
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bfs(i, j);
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}
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}
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}
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tot = 0;
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for (int i = 1; i <= n; i++) {
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for (int j = 1; j <= m; j++) {
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if (maz[i][j] && !done[maz[i][j]]) {
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done[maz[i][j]] = 1;
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solve(i, j);
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}
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}
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}
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printf("Case %d\n", T++);
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if (tot) {
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sort(ans, ans + tot);
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for (int i = 0; i < tot; i++)
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printf("%d%s", ans[i], (i == tot - 1) ? "\n" : " ");
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} else
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printf("no objects found\n");
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}
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return 0;
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}
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