Compilare: main.cpp: In function 'int main()': main.cpp:53:24: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] if(pos + 1 << x <= n && sum + fen[pos + 1 << x] <= a) sum += fen[pos + 1 << x], pos += 1 << x; ~~~~^~~ main.cpp:53:55: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] if(pos + 1 << x <= n && sum + fen[pos + 1 << x] <= a) sum += fen[pos + 1 << x], pos += 1 << x; ~~~~^~~ main.cpp:53:86: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] if(pos + 1 << x <= n && sum + fen[pos + 1 << x] <= a) sum += fen[pos + 1 << x], pos += 1 << x; ~~~~^~~