Compilare: main.cpp: In function 'void heapify(int)': main.cpp:17:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | if(l<heap.size() && d[heap[l]] < d[heap[minim]]) minim = l; | ~^~~~~~~~~~~~ main.cpp:18:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | if(r<heap.size() && d[heap[r]] < d[heap[minim]]) minim = r; | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:44:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<arc>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int i=0; i<a[1].size(); i++) | ~^~~~~~~~~~~~ main.cpp:51:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<arc>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i=0; i<a[pmin].size(); i++){ | ~^~~~~~~~~~~~~~~