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https://github.com/Kiritow/OJ-Problems-Source.git
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17 lines
291 B
C++
17 lines
291 B
C++
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#include <stdio.h>
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int main()
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{
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int a,b,k;
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while(scanf("%d%d%d",&a,&b,&k)!=EOF&&a&&b)
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{
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int m=1;
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while(k--)
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m*=10;
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if(a%m==b%m)
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printf("-1\n");
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else
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printf("%d\n",a+b);
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}
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return 0;
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}
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