Compilare: user.cpp: In function ‘void solve(int, int)’: user.cpp:41:9: warning: unused variable ‘s’ [-Wunused-variable] int s,i; ^ user.cpp: In function ‘int main()’: user.cpp:61:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[100001]’ [-Wformat=] fscanf(fin ,"%s", &ex); ^ user.cpp:61:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin ,"%s", &ex); ^