Compilare: user.cpp: In function ‘int main()’: user.cpp:39:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<dp[l[i]-1].size(); j++){ ^ user.cpp:50:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<dp[m].size(); i++){ ^ user.cpp:14:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("subsiruri.in", "r", stdin); ^ user.cpp:15:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("subsiruri.out", "w", stdout); ^ user.cpp:17:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:20:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &v[i]); ^