Compilare: main.cpp: In function 'void merge_e(std::vector<edge>&, std::vector<edge>&, std::vector<edge>&)': main.cpp:52:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | while(i < e1.size() && j < e2.size()) | ~~^~~~~~~~~~~ main.cpp:52:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | while(i < e1.size() && j < e2.size()) | ~~^~~~~~~~~~~ main.cpp:67:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | while(i < e1.size()) | ~~^~~~~~~~~~~ main.cpp:74:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | while(j < e2.size()) | ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:124:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 124 | for(int k = 0; k < e_kruskal.size(); k++) | ~~^~~~~~~~~~~~~~~~~~