Compilare: user.cpp: In function ‘void detjos(int)’: user.cpp:11:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘void detsus(int)’: user.cpp:24:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘int main()’: user.cpp:52:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<a[i].size();++j) ^ user.cpp:63:9: warning: unused variable ‘start’ [-Wunused-variable] int start; ^ user.cpp:40:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:43:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^