Compilare: main.cpp: In function 'int main()': main.cpp:23:22: warning: unused variable 'nr2' [-Wunused-variable] int n,m,i,j,t,nr,nr2,pos,k,sol; ^~~ main.cpp:24:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d\n",&n,&m); ^ main.cpp:25:28: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread (buff,1,2000,fin); ^