Compilare: main.cpp: In function 'void indirecta(int, int, int&)': main.cpp:25:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<short int, short int>, short int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] main.cpp: In function 'int32_t main(int, char**)': main.cpp:91:49: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] main.cpp:135:62: warning: narrowing conversion of 'colu' from 'int' to 'short int' [-Wnarrowing] main.cpp:51:40: warning: unused variable 'ok' [-Wunused-variable]