Compilare: user.cpp: In function ‘void pre()’: user.cpp:20:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] long long rez = (comb[i-1].size() > j ? comb[i-1][j] : 0); ^ user.cpp: In function ‘int getComb(int, int)’: user.cpp:49:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (_k >= comb[_n].size()) ^ user.cpp: In function ‘int main()’: user.cpp:85:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("provocare.in", "r", stdin); ^ user.cpp:86:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("provocare.out", "w", stdout); ^ user.cpp:88:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:91:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &a, &b); ^