Compilare: main.cpp: In function 'int main()': main.cpp:65:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tnia.in", "r", stdin); ^ main.cpp:66:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tnia.out", "w", stdout); ^ main.cpp:67:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:70:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ main.cpp:75:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ main.cpp:79:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &a, &b, &c, &d); ^ main.cpp: In function 'int BSearch(int, int, int)': main.cpp:50:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] int mid, ans; ^~~ main.cpp: In function 'int main()': main.cpp:81:35: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] int mid1 = BSearch(a, c, b) - 1; ^ main.cpp:82:35: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] int mid2 = BSearch(a, c, d) - 1; ^