Compilare: main.cpp: In function 'int main()': main.cpp:8:28: warning: unused variable 'val' [-Wunused-variable] int n,m,k,i,x,y,vmax,j,val,ind,ant; ^~~ main.cpp:10:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pavare.in","r",stdin); ^ main.cpp:11:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pavare.out","w",stdout); ^