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08/01/25 00:54:52
>>454
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#define N 10
int main( void )
{
int a[ N ] = {0,1,2,3,4,5,6,7,8,9};// 9876543210
int b[ N ] = {0,1,2,3,4,5,6,7,8,9};// 9876543210
int result[ N * 2 ] = { 0 }; // 9876543210*9876543210=97546105778997104100
for ( int i = 0; i < N; i++ ) {
for ( int j = 0; j < N; j++ ) {
result[ i + j ] += ( a[ i ] * b[ j ] );
for ( int k = i + j; k < N * 2 - 1; k++ ) {
if ( result[ k ] < 10 ) break;
result[ k + 1 ] += result[ k ] / 10;
result[ k ] %= 10;

}
}
}
for ( int i = N * 2 - 1; i >= 0; i-- ) {
printf( "%d", result[ i ] );
}
return 0;
}


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