比赛 |
2025暑期集训第7场 |
评测结果 |
ATAAAAAAAA |
题目名称 |
填数 |
最终得分 |
90 |
用户昵称 |
ChenBp |
运行时间 |
3.380 s |
代码语言 |
C++ |
内存使用 |
3.62 MiB |
提交时间 |
2025-08-11 15:37:57 |
显示代码纯文本
#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;
const int N = 13;
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
const bool p[350] = {
0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0,
1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1,
0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0,
0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0,
0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0,
0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0,
0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0};
int n;
bool vis[N * N];
int g[N][N];
int ans[N][N];
bool ch(int x, int y, int num) {
if (x != 1 && !p[g[x - 1][y] + num])
return 0;
if (y != 1 && !p[g[x][y - 1] + num])
return 0;
return 1;
}
void dfs(int x, int y) {
// cout << x << " " << y << endl;
if (x == n + 1) {
int ok = 0;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
if (g[i][j] < ans[i][j]) {
ok = 1;
break;
}
if (g[i][j] > ans[i][j]) {
return;
}
}
if (ok)
break;
}
memcpy(ans, g, sizeof(g));
return;
}
if (y == n + 1) {
dfs(x + 1, 1);
}
int s, k;
if (y == 1) {
s = 2;
k = 1;
} else if (g[x][y - 1] & 1) {
s = 2;
k = 2;
} else {
s = 3;
k = 2;
}
for (int i = s; i <= ans[x][y]; i += k) {
if (!vis[i] && ch(x, y, i)) {
g[x][y] = i;
vis[i] = 1;
dfs(x, y + 1);
vis[i] = 0;
g[x][y] = 0;
}
}
}
int main() {
freopen("tianshu.in", "r", stdin);
freopen("tianshu.out", "w", stdout);
cin >> n;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
ans[i][j] = n * n;
}
}
g[1][1] = 1;
vis[1] = 1;
dfs(1, 2);
if (ans[1][1] == n * n) {
cout << "NO";
return 0;
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
cout << ans[i][j] << " \n"[j == n];
}
}
return 0;
}