Sudoku

input/code.cpp: In function 'int main()':
input/code.cpp:32:21: warning: unused variable 'off' [-Wunused-variable]
                 int off = (idx-1)%3;
                     ^

#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
 
char buf[9][10];
 
int main() {
    cin >> buf[0];
    copy(buf[0]+3, buf[0]+6, buf[1]);
    copy(buf[0]+6, buf[0]+9, buf[2]);
 
    copy(buf[0], buf[0]+3, buf[2]+3);
    copy(buf[0]+6, buf[0]+9, buf[1]+3);
 
    copy(buf[0], buf[0]+3, buf[1]+6);
    copy(buf[0]+3, buf[0]+6, buf[2]+6);
 
    for (int i = 3; i < 6; ++i) {
        for (int b = 0; b < 3; ++b) {
            for (int k = 0; k < 3; ++k) {
                int idx = b*3 + k;
                buf[i][b*3 + (idx + 1)%3] = buf[i-3][idx];
            }
        }
    }
 
    for (int i = 6; i < 9; ++i) {
        for (int b = 0; b < 3; ++b) {
            for (int k = 0; k < 3; ++k) {
                int idx = b*3 + k;
                int off = (idx-1)%3;
                buf[i][b*3 + (idx + 1)%3] = buf[i-3][idx];
            }
        }
    }
 
    for (int i = 0; i < 9; ++i) {
        cout << buf[i] << endl;
    }
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED