Compilare: user.cpp: In function ‘int mp(int)’: user.cpp:11:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v.size() && v[i] < val; i++) { ^ user.cpp:10:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, sum = 0; ^ user.cpp: In function ‘int main()’: user.cpp:18:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:19:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sume2.in", "r", stdin); ^ user.cpp:20:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sume2.out", "w", stdout); ^ user.cpp:21:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &K); ^ user.cpp:24:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^