Compilare: user.cpp: In function ‘int main()’: user.cpp:4:15: warning: unused variable ‘i1’ [-Wunused-variable] int n,i,j,i1,j1,nr,sol,lin,max=-999999999,s,nrap,m,sc,sm; ^ user.cpp:4:18: warning: unused variable ‘j1’ [-Wunused-variable] int n,i,j,i1,j1,nr,sol,lin,max=-999999999,s,nrap,m,sc,sm; ^ user.cpp:4:47: warning: unused variable ‘s’ [-Wunused-variable] int n,i,j,i1,j1,nr,sol,lin,max=-999999999,s,nrap,m,sc,sm; ^ user.cpp:5:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("peri.in","r",stdin); ^ user.cpp:6:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("peri.out","w",stdout); ^ user.cpp:7:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:10:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&nr); ^