Compilare: user.cpp: In function ‘bool cmp(L, L)’: user.cpp:21:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a.v == b.v) ^ user.cpp: In function ‘int main()’: user.cpp:49:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = nr + 1; i != v.size() && v[i].v == lev; i++); ^ user.cpp:56:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr + 1 != v.size()) ^ user.cpp:31:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rascoala.in", "r", stdin); ^ user.cpp:32:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rascoala.out", "w", stdout); ^ user.cpp:33:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &p); ^ user.cpp:34:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld %ld", &n, &m, &z); ^ user.cpp:37:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &crt); ^