(c++) SWEA "1974) 스도쿠 검증"

https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AV5Psz16AYEDFAUq 

SW Expert Academy

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#include <iostream>
#include <vector>

using namespace std;

int main() {
	int T; cin >> T;
	for (int t = 1; t <= T; t++) {
		bool flag = true;
		bool row[9][10] = { false };
		bool col[9][10] = { false };
		bool squ[9][10] = { false };
		for (int i = 0; i < 9; i++) {
			for (int k = 0; k < 9; k++) {
				int n; cin >> n;
				if (flag) {
					int index = (i / 3) * 3 + k / 3;
					if (!row[i][n] && !col[k][n] && !squ[index][n]) {
						row[i][n] = col[k][n] = squ[index][n] = true;
					}
					else {
						flag = false;
					}
				}
			}
		}
		cout << "#" << t << " " << flag << endl;
	}
}