Compilare: main.cpp: In function 'int main()': main.cpp:249:9: warning: unused variable 'K' [-Wunused-variable] int K = Q; ^ main.cpp:243:37: 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:244:39: 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:248:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &Q); ^ main.cpp:251:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s ", ch); ^ main.cpp:255:52: 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:261:52: 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:265:52: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ", &inv.first, &inv.second); ^