Compilare: main.cpp: In function 'int main()': main.cpp:250:9: warning: unused variable 'K' [-Wunused-variable] int K = Q; ^ main.cpp:244:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("brasov.in", "r", stdin); ^ main.cpp:245:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("brasov.out", "w", stdout); ^ main.cpp:249:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &Q); ^ main.cpp:252:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s ", ch); ^ main.cpp:256:52: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ", &inv.first, &inv.second); ^ main.cpp:263:52: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ", &inv.first, &inv.second); ^ main.cpp:268:52: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ", &inv.first, &inv.second); ^