评测结果
编译成功

测试数据 #0: Accepted, time = 0 ms, mem = 504 KiB, score = 10
测试数据 #1: Accepted, time = 0 ms, mem = 508 KiB, score = 10
测试数据 #2: Accepted, time = 15 ms, mem = 508 KiB, score = 10
测试数据 #3: Accepted, time = 0 ms, mem = 508 KiB, score = 10
测试数据 #4: Accepted, time = 281 ms, mem = 508 KiB, score = 10
测试数据 #5: Accepted, time = 93 ms, mem = 508 KiB, score = 10
测试数据 #6: TimeLimitExceeded, time = 1031 ms, mem = 496 KiB, score = 0
测试数据 #7: TimeLimitExceeded, time = 1015 ms, mem = 500 KiB, score = 0
测试数据 #8: TimeLimitExceeded, time = 1203 ms, mem = 500 KiB, score = 0
测试数据 #9: Accepted, time = 890 ms, mem = 508 KiB, score = 10
TimeLimitExceeded, time = 4528 ms, mem = 508 KiB, score = 70
代码
#include <cstdio>
int main() {
  long long a,b;
  scanf("%I64d%I64d",&a,&b);
  for (long long x = 1;;x++)
    if (a*x%b == 1) {
      printf("%I64d",x);
      return 0;
    }
}