Compilare: main.cpp: In function 'int main()': main.cpp:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < p.size() && p[j] <= p[lp[i] - 1] && i * p[j] <= m ; ++j) ~~^~~~~~~~~~ main.cpp:39:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = lp[i] - 1; j < p.size() && i * p[j] <= m ; ++j) ~~^~~~~~~~~~ main.cpp:13:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tygyn.in", "r", stdin); ^ main.cpp:14:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tygyn.out", "w", stdout); ^ main.cpp:16:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:20:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^