處理大格時，用了些較複雜的式子，使 1~9 與其對應。
When processing the 3x3 grids, some more complicated calculations are used to corresond the spaces to 1~9.
ZeroJudge Link (Zh)
#include <stdio.h>
main() {
int arr[9][9];
while (scanf("%d", arr) != EOF) {
int i, j, collide = 0;
int nums[10] = { 0 };
for (i = 1; i < 81; i++) scanf("%d", (int*)arr+i);
for (i = 0; i < 9; i++) {
for (j = 0; j < 9; j++) {
if (!nums[arr[i][j]]) nums[arr[i][j]] = 1;
else {
collide = 1;
break;
}
}
for (j = 0; j < 10; j++) nums[j] = 0;
}
for (i = 0; i < 9; i++) {
for (j = 0; j < 9; j++) {
if (!nums[arr[j][i]]) nums[arr[j][i]] = 1;
else {
collide = 1;
break;
}
}
for (j = 0; j < 10; j++) nums[j] = 0;
}
for (i = 0; i < 9; i++) {
for (j = 0; j < 9; j++) {
if (!nums[arr[i/3*3+j/3][i%3*3+j%3]]) nums[arr[i/3*3+j/3][i%3*3+j%3]] = 1;
else {
collide = 1;
break;
}
}
for (j = 0; j < 10; j++) nums[j] = 0;
}
printf("%s\n", collide? "no": "yes");
}
return 0;
}