foo.c: In function 'main':
foo.c:5:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&a,&b);
     ^

自豪的采用 HydroJudger 进行评测(github.com/hydro-dev/HydroJudger)

您没有提供题目配置文件。正在使用默认时空限制 1s 256M 。
识别到5个测试点
{"receive":"2020-05-10T11:11:17.995Z","handle":"2020-05-10T11:11:17.995Z","cache_start":"2020-05-10T11:11:18.009Z","read_cases":"2020-05-10T11:11:18.114Z","judge":"2020-05-10T11:11:18.115Z","done":"2020-05-10T11:11:18.398Z"}