Compilare: user.cpp: In function ‘int dist(long long int, long long int, long long int, long long int)’: user.cpp:21:63: warning: unused variable ‘vl’ [-Wunused-variable] long long dst = (x1 - x2)*(x1 - x2) + (y1 - y2)*(y1 - y2),vl = 0; ^ user.cpp: In function ‘void solveA()’: user.cpp:67:25: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d\n",totalA); ^ user.cpp: In function ‘void solveB()’: user.cpp:74:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < tr.size(); ++i) ^ user.cpp: In function ‘void read()’: user.cpp:38:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&N,&K,&B); ^ user.cpp:40:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&h[i]); ^ user.cpp: In function ‘int main()’: user.cpp:94:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("telecab.in","r",stdin); ^ user.cpp:95:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("telecab.out","w",stdout); ^