Compilare: user.cpp: In function ‘void dfs(int, int, long long int)’: user.cpp:26:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘int par(int, int, long long int, std::priority_queue<Edge>)’: user.cpp:40:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++){ ^ user.cpp:43:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[node].size(); j++) ^ user.cpp:55:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:65:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &h); ^ user.cpp:70:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%lld", &x, &y, &c); ^