Compilare: main.cpp: In function 'int main()': main.cpp:35:7: warning: variable 'ok' set but not used [-Wunused-but-set-variable] bool ok; ^~ main.cpp:36:31: 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:37:33: 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:38:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &l, &u);p1=1;p0=1; ^ main.cpp:40:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^