Compilare: main.cpp:6:9: warning: ISO C++11 requires whitespace after the macro name 6 | #define pair<int, int> pi | ^~~~ main.cpp: In function 'void solve()': main.cpp:21:11: warning: comparison of integer expressions of different signedness: 'long long int' and 'const size_type' {aka 'const long unsigned int'} [-Wsign-compare] 21 | while(cur!=string::npos){ | ~~~^~~~~~~~~~~~~~