Compilare: main.cpp: In function 'int minn(int)': main.cpp:28:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<range>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | while ( i < stk.size() ) { | ~~^~~~~~~~~~~~ main.cpp:29:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<range>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | while ( i < stk.size() && st > stk[i].y ) { | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<range>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for ( int i = 0; i < stk.size(); ++i ) { | ~~^~~~~~~~~~~~