Compilare: main.cpp: In function 'int binsearch(int, int)': main.cpp:35:9: warning: unused variable 'mid' [-Wunused-variable] int mid, last; ^~~ main.cpp: In function 'void read()': main.cpp:12:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &K); ^ main.cpp:14:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ main.cpp: In function 'int main()': main.cpp:48:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("transport.in", "r", stdin); ^ main.cpp:49:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("transport.out", "w", stdout); ^ main.cpp: In function 'int binsearch(int, int)': main.cpp:43:12: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^~~~