Compilare: main.cpp:8:13: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] uint v[1<<20+1]; ~~^~ main.cpp: In function 'ull solve(int)': main.cpp:22:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (freq.size() <= sz) { ~~~~~~~~~~~~^~~~~ main.cpp:26:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (freq.size() > sz) { ~~~~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:39:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.in", "r", stdin); ^ main.cpp:40:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv5.out", "w", stdout); ^ main.cpp:42:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n,&l,&u); ^ main.cpp:45:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%u", &v[i]); ^