Compilare: main.cpp: In function 'int main()': main.cpp:26:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<double, double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (index2 = 0; index2 < coordonate.size() and get<0>(coordonate[index2]) < x; index2 += 1) { | ~~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:32:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<double, double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (index2 = 0; index2 < coordonate.size() - 1; index2 += 1) { | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:45:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<double, double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (index2 = 0; index2 < coordonate.size() and get<0>(coordonate[index2]) < x; index2 += 1) { | ~~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:53:45: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<double, double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (index2 = 0; index2 < coordonate.size() - 1; index2 += 1) { | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~