Compilare: user.cpp: In function ‘void buildSolution()’: user.cpp:118:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < compo.size() && goon; i++) { ^ user.cpp:122:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (!sol.empty() && i+1 < compo.size()) sol.pop_back(); ^ user.cpp: In function ‘void citire()’: user.cpp:20:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:22:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^ user.cpp:26:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &s, &e, &q); ^ user.cpp: In function ‘int main()’: user.cpp:130:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("santa.in", "r", stdin); ^ user.cpp:131:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("santa.out", "w", stdout); ^