Compilare: main.cpp: In function 'void solve(std::vector<int>&)': main.cpp:90:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cyc.size() - 1 ; ++i) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:160:30: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n", ans.size()); ^ main.cpp:126:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("plimbare.in", "r", stdin); ^ main.cpp:127:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("plimbare.out", "w", stdout); ^ main.cpp:131:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:147:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^