joi2019_ho_t3.cpp: In function 'int main()':
joi2019_ho_t3.cpp:7:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&N,&M);
~~~~~^~~~~~~~~~~~~~
joi2019_ho_t3.cpp:8:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for(int i=0; i<N; ++i) scanf("%d%d",&A[i].second,&A[i].first);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:9:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
for(int i=0; i<M; ++i) scanf("%d",C+i);
~~~~~^~~~~~~~~~