Compilare: user.cpp: In function ‘int sol(int)’: user.cpp:49:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= n; ++i) ^ user.cpp: In function ‘int main()’: user.cpp:74:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= n; ++i) ^ user.cpp:80:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= n; ++i) ^ user.cpp: In function ‘int Find(unsigned int)’: user.cpp:41:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:69:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.in", "r", stdin); ^ user.cpp:70:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.out", "w", stdout); ^ user.cpp:72:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n", &n, &l, &u); ^ user.cpp:76:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &a[i]); ^