Compilare: main.cpp: In function 'int sq3(int)': main.cpp:14:19: warning: unused variable 'mid' [-Wunused-variable] int left = 0, mid, right = 100001; ^~~ main.cpp: In function 'int main()': main.cpp:27:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("asi.in", "r", stdin); ^ main.cpp:28:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("asi.out", "w", stdout); ^ main.cpp:40:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int q; scanf("%d", &q); ^ main.cpp:42:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int a, b; scanf("%d %d", &a, &b); ^