Compilare: main.cpp: In function 'int main()': main.cpp:138:58: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses] lines[j] = {-2 * sp[j], sp[j] * sp[j] + dp[1 - i & 1][j]}; ~~^~~ main.cpp:142:41: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses] dp[i & 1][j] = max(max(dp[1 - i & 1][j], dp[i & 1][j - 1]), query(1, 1, n, max(last[j], 1), j - 1, sp[j]) + sp[j] * sp[j]); ~~^~~