九宫格
输入样例：
3
5 1 9 2 8 3 4 6 7
7 2 8 9 6 4 3 5 1
3 4 6 5 7 1 9 2 8
8 9 2 1 4 5 7 3 6
4 7 3 6 2 8 1 9 5
6 5 1 7 3 9 2 8 4
9 3 4 8 1 6 5 7 2
1 6 7 3 5 2 8 4 9
2 8 5 4 9 7 6 1 3
8 2 5 4 9 7 1 3 6
7 9 6 5 1 3 8 2 4
3 4 1 6 8 2 7 9 5
6 8 4 2 7 1 3 5 9
9 1 2 8 3 5 6 4 7
5 3 7 9 6 4 2 1 8
2 7 9 1 5 8 4 6 3
4 5 8 3 2 6 9 7 1
1 6 3 7 4 9 5 8 3
81 2 5 4 9 7 1 3 6
7 9 6 5 1 3 8 2 4
3 4 1 6 8 2 7 9 5
6 8 4 2 7 1 3 5 9
9 1 2 8 3 5 6 4 7
5 3 7 9 6 4 2 1 8
2 7 9 1 5 8 4 6 3
4 5 8 3 2 6 9 7 1
1 6 3 7 4 9 5 8 2
输出样例：
1
0
0
AC代码：
点击查看代码
#include<iostream>
#include<vector>
#include<unordered_set>
using namespace std;int main() {int n;cin >> n;while (n--) {int a[9][9],flag=0;for (int i=0;i<9;++i){for (int j=0;j<9;++j) {cin >> a[i][j];}}unordered_set<int> s;for (auto& ele : a) {for (auto& e : ele) {if(e>0&&e<10)s.insert(e);}if(s.size()!=9) {cout << "0\n";flag=1;break;}s.clear();}if(flag) continue;for (int i=0;i<9;++i) {for (auto& ele : a) {if(ele[i]>0&&ele[i]<10)s.insert(ele[i]);}if(s.size()!=9) {cout << "0\n";flag=1;break;}s.clear();}if(flag) continue;for (int x = 0; x < 9; x += 3) {for (int y = 0; y < 9; y += 3) {s.clear();for (int i = x; i < x+3; ++i) {for (int j = y; j < y+3; ++j) {if(a[i][j]>0&&a[i][j]<10) s.insert(a[i][j]);}}if (s.size() != 9) {cout << "0\n";flag = 1;break;}}if (flag) break;}if(!flag) cout << "1\n";}return 0;}很简单，困困困晚上不困打比赛困，无力
