Compilare: user.cpp: In function ‘void print()’: user.cpp:45:9: warning: unused variable ‘pz’ [-Wunused-variable] int pz = S; ^ user.cpp: In function ‘void DFS(int, int)’: user.cpp:77:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < w.size(); ++i) ^ user.cpp: In function ‘void Solve()’: user.cpp:99:9: warning: unused variable ‘smax’ [-Wunused-variable] int smax = 0; ^ user.cpp:101:9: warning: unused variable ‘upd’ [-Wunused-variable] int upd = 1; ^ user.cpp:102:9: warning: unused variable ‘snow’ [-Wunused-variable] int snow; ^ user.cpp:103:9: warning: unused variable ‘step’ [-Wunused-variable] int step = 0 ; ^ user.cpp: In function ‘void Read()’: user.cpp:15:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &S); ^ user.cpp: In function ‘int main()’: user.cpp:137:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi.in","r",stdin); ^ user.cpp:138:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi.out","w",stdout); ^