题解 | #还是A+B#
还是A+B
https://www.nowcoder.com/practice/8c3c5dae2c4a4266ba04f993a18e286b
#include<cstdio>
int main(){
int a, b, k;
while (scanf("%d %d %d", &a, &b, &k) != EOF){
if (a == 0&&b==0){
break;
}
int x = a, y = b,i=1;
for (; i <= k; i++){
if (a % 10 != b % 10){
break;
}
else{
a = a / 10;
b = b / 10;
}
}
if (i > k){
printf("-1\n");
}
else{
printf("%d\n", x + y);
}
}
}
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