Compilare: main.cpp: In function 'int main()': main.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<strlen(s); ++i) ~^~~~~~~~~~ main.cpp:11:9: warning: unused variable 'n' [-Wunused-variable] int n,i,j,k,m,l,lmax,r,c; ^ main.cpp:11:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j,k,m,l,lmax,r,c; ^ main.cpp:11:17: warning: unused variable 'm' [-Wunused-variable] int n,i,j,k,m,l,lmax,r,c; ^ main.cpp:11:21: warning: unused variable 'lmax' [-Wunused-variable] int n,i,j,k,m,l,lmax,r,c; ^~~~ main.cpp:9:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld.in","r",stdin); ^ main.cpp:10:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld.out","w",stdout); ^ main.cpp:12:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s); ^