Compilare: main.cpp: In function 'int dijkstra(int)': main.cpp:52:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<tripla>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (i = 0; i < a[cur.y].size(); i++) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:69:9: warning: unused variable 'i' [-Wunused-variable] 69 | int i, st, dr, mij; | ^