Compilare: user.cpp: In function ‘int findFirst(int, int)’: user.cpp:63:14: warning: statement has no effect [-Wunused-value] for (step; step; step >>= 1) ^ user.cpp: In function ‘int findLast(int, int)’: user.cpp:73:14: warning: statement has no effect [-Wunused-value] for (step; step; step >>= 1) ^ user.cpp: In function ‘void citire()’: user.cpp:15:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &k, &q); ^ user.cpp:18:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^ user.cpp:20:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &qs[i]); ^ user.cpp: In function ‘int main()’: user.cpp:107:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xcmmdc.in", "r", stdin); ^ user.cpp:108:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xcmmdc.out", "w", stdout); ^