Compilare: main.cpp: In function 'bool check(long long int, int, int)': main.cpp:11:9: warning: unused variable 'ok' [-Wunused-variable] int ok = 1; ^~ main.cpp: In function 'int main()': main.cpp:24:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tarabe.in", "r", stdin); ^ main.cpp:25:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tarabe.out", "w", stdout); ^ main.cpp:28:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ main.cpp:30:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &b[i], &a[i]); ^ main.cpp:44:5: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] if (a[i] > last) ^~