Compilare: main.cpp: In function 'bool ok(int)': main.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind<poz.size() && poz[ind]<=i-k){ ~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("auto.in","r",stdin); ^ main.cpp:40:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("auto.out","w",stdout); ^ main.cpp:42:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ main.cpp:45:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:49:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^