Compilare: main.cpp:15:1: warning: 'typedef' was ignored in this declaration typedef struct compareEdges { ^~~~~~~ main.cpp: In function 'void display(std::vector<node>&, int)': main.cpp:45:32: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<node>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n%d\n",sum,a.size()); ^ main.cpp:46:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'void solve(int, std::vector<node>)': main.cpp:94:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph.size();i++) ~^~~~~~~~~~~~~ main.cpp: In function 'void read(int&, int&, std::vector<node>&)': main.cpp:25:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in", "r", stdin); ^ main.cpp:26:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out", "w", stdout); ^ main.cpp:28:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &vertices_number, &edges_number); ^ main.cpp:36:86: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &new_node.first_verted, &new_node.second_vertex, &new_node.value); ^