Compilare: main.cpp: In function 'int main()': main.cpp:32:27: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] for(int j = 1; j + (1<<i-1) <= n; ++j) { ~^~ main.cpp:33:49: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] rmq[i][j] = min(rmq[i-1][j], rmq[i-1][j+(1<<i-1)]); ~^~ main.cpp:15:32: 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); ^ main.cpp:16:34: 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); ^