Compilare: user.cpp: In function ‘void solve()’: user.cpp:28:22: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] for(i = 1; i + 1 << j - 1 <= n; ++ i) ^ user.cpp:29:47: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] dp[i][j] = Min(dp[i][j - 1], dp[i + 1 << (j - 1)][j - 1]); ^ user.cpp: In function ‘void read()’: user.cpp:10:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.in", "r", stdin); ^ user.cpp:11:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.out", "w", stdout); ^ user.cpp:12:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:14:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &dp[i][0]); ^ user.cpp: In function ‘void write()’: user.cpp:36:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^