Compilare: main.cpp: In function 'int closestFibo(int)': main.cpp:44:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for (int i = 0; i < fibo.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp: In function 'void solve2()': main.cpp:120:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 120 | for (int i = 0; i < sums.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:127:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 127 | for (int i = 0; i < sums.size() - 1; i += 2) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:130:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 130 | if (i < sums.size() - 2) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:144:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 144 | for (int i = 1; i < sums.size() - 1; i += 2) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:147:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 147 | if (i < sums.size() - 2) { | ~~^~~~~~~~~~~~~~~~~