#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define INIT std::ios::sync_with_stdio(false);std::cin.tie(0); #define VAR(type, ...)type __VA_ARGS__;Scan(__VA_ARGS__); template void Scan(T& t) { std::cin >> t; } templatevoid Scan(First& first, Rest&...rest) { std::cin >> first; Scan(rest...); } #define OUT(d) std::cout< c(n);for(auto& i:c)std::cin>>i; #define MAT(type, c, m, n) std::vector> c(m, std::vector(n));for(auto& r:c)for(auto& i:r)std::cin>>i; #define ALL(a) (a).begin(),(a).end() #define FOR(i, a, b) for(int i=(a);i<(b);++i) #define RFOR(i, a, b) for(int i=(b)-1;i>=(a);--i) #define REP(i, n) for(int i=0;i=0;--i) #define PAIR std::pair #define IN(a, x, b) (a<=x && x<=b) #define IN2(a0, y, a1, b0, x, b1) (a0<=y && y(end-start).count();std::cerr<<"[Time:"< tmp(a);std::cout << #a << "\t:";for(int i=0; i(a.size()); ++i){std::cout << tmp.front() << "\n";tmp.pop();}std::cout << "\n";} //#define int ll using ll = long long; constexpr int INFINT = 1 << 30; constexpr ll INFLL = 1LL << 60; constexpr double EPS = 0.0000001; constexpr int MOD = 1000000007; int main() { INIT; int l = 10, h = 1000000000; while (h - l > 1) { int mid = (l + h) / 2; OUT("? ")OUT(mid)ENDL; VAR(int, res); switch (res) { case -1: h = mid; break; case 0: OUT("! ")OUT(--mid)ENDL; return 0; case 1: l = mid; break; } --l; --h; if (l < 0)l = 0; } OUT("! ")OUT(std::max(--l, 0))ENDL; return 0; }