Compilare: user.cpp: In function ‘int main()’: user.cpp:55:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < way.size(); i++) { ^ user.cpp:64:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < way.size(); i++) { ^ user.cpp:34:36: 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:35:38: 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); ^ user.cpp:37:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &k, &s); ^ user.cpp:38:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= n; i++) scanf("%d", &H[i]); ^