Compilare: main.cpp: In function 'bool ok()': main.cpp:24:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(idr < dr.size()) ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:70:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("piruete.in", "r", stdin); ^ main.cpp:71:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("piruete.out", "w", stdout); ^ main.cpp:73:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &t, &n, &k); ^