110 lines
2.9 KiB
C++
110 lines
2.9 KiB
C++
#include <cstdlib>
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#include <cstdio>
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#include <cstring>
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#include <algorithm>
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#include <iostream>
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using namespace std;
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int N, M, idx;
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int sta[175], num[175];
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int cnt[15], mp[105];
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int f[105][175][175];
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void print(int x) {
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int rec[50] = {0}, p = 0;
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while (x) {
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rec[p++] = x % 2;
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x /= 2;
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}
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for (int i = 9; i >= 0; --i) {
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printf(i == 0 ? "%d\n" : "%d", rec[i]);
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}
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}
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inline bool legal(int x) {
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if (x & (x << 2)) return false;
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return true;
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}
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void init() {
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int lim;
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idx = 1;
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for (int k = 1; k <= 10; ++k) {
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lim = 1 << k;
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for (int i = 1<<(k-1); i < lim; ++i) {
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if (legal(i)) {
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sta[idx] = i;
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for (int j = 0; j < k; ++j) {
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if (i & (1 << j)) ++num[idx];
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}
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idx++;
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}
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}
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cnt[k] = idx;
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}
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}
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inline bool place(int x, int y) {
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return (x & y) == x;
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}
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inline bool judge_1(int x, int y) {
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if ((x << 1) & y || (x >> 1) & y) return false;
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return true;
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}
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inline bool judge_2(int x, int y) {
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if (x & y) return false;
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return true;
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}
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int solve() {
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int ret = 0;
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memset(f, 0, sizeof (f));
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if (N == 1) {
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for (int i = 0; i < cnt[M]; ++i) {
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if (place(sta[i], mp[1])) {
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ret = max(ret, num[i]);
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}
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}
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return ret;
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}
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for (int i = 0; i < cnt[M]; ++i) {
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if (!place(sta[i], mp[2])) continue;
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for (int j = 0; j < cnt[M]; ++j) {
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if (!place(sta[j], mp[1])) continue;
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if (judge_1(sta[i], sta[j])) {
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f[2][i][j] = num[i] + num[j];
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}
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}
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}
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for (int i = 3; i <= N; ++i) {
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for (int j = 0; j < cnt[M]; ++j) {
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if (!place(sta[j], mp[i])) continue;
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for (int k = 0; k < cnt[M]; ++k) {
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if (!place(sta[k], mp[i-1]) || !judge_1(sta[j], sta[k])) continue;
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for (int h = 0; h < cnt[M]; ++h) {
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if (!place(sta[h], mp[i-2]) || !judge_1(sta[k], sta[h])) continue;
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if (judge_2(sta[j], sta[h])) {
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f[i][j][k] = max(f[i][j][k], f[i-1][k][h] + num[j]);
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}
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}
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}
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}
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}
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for (int i = 0; i < cnt[M]; ++i) {
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for (int j = 0; j < cnt[M]; ++j) {
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ret = max(ret, f[N][i][j]);
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}
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}
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return ret;
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}
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int main() {
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init();
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int c;
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while (scanf("%d %d", &N, &M) != EOF) {
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memset(mp, 0, sizeof (mp));
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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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scanf("%d", &c);
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mp[i] <<= 1;
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mp[i] |= c;
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}
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}
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printf("%d\n", solve());
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}
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return 0;
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}
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