Compilare: user.cpp: In function ‘int parantr(int&)’: user.cpp:56:18: warning: unused variable ‘q’ [-Wunused-variable] int s=0,maxs,q,j,k,l=0,v[100001],sp[100001]; ^ user.cpp: In function ‘int main()’: user.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(a);i++) ^ user.cpp: In function ‘int reduc(int&)’: user.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:80:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",a); ^