/* Time: 2021-10-20 Test: add & minus (signed) std Time: 0.14s Time Limit: 1.00s */ #include "int2048.h" sjtu::int2048 a; std::string s; int main() { int n; std::cin >> n; for (int i = 1; i <= n; i++) { std::cin >> s; if (i & 1) a += s; else a -= s; std::cout << a << '\n'; } }