Compilare: main.cpp: In function 'int main()': main.cpp:55:24: warning: array subscript has type 'char' [-Wchar-subscripts] v1[mm[i][j]]=nrc; ^ main.cpp:8:29: warning: unused variable 'nrb' [-Wunused-variable] int p,n,m,k,i,j,a,b,r,i1,j1,nrb,nrc,m1=0; ^~~ main.cpp:9:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bec.in","r",stdin); ^ main.cpp:10:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bec.out","w",stdout); ^