Compilare: user.cpp: In function ‘void solve(int)’: user.cpp:66: warning: unused variable ‘st’ user.cpp:66: warning: unused variable ‘dr’ user.cpp:66: warning: unused variable ‘P’ user.cpp: In function ‘int main()’: user.cpp:139: warning: format ‘%s’ expects type ‘char*’, but argument 2 has type ‘char (*)[1000010]’ user.cpp:140: warning: format ‘%s’ expects type ‘char*’, but argument 2 has type ‘char (*)[1000010]’ user.cpp:137: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:138: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:139: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:140: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result