#ifdef LOCAL #define _GLIBCXX_DEBUG #define __clock__ #else #pragma GCC optimize("Ofast") #endif #include using namespace std; using ll = long long; using LL = __int128; using ld = long double; using VI = vector; using VV = vector; using VS = vector; using PII = pair; // tourist set template string to_string(pair p); template string to_string(tuple p); template string to_string(tuple p); string to_string(const string& s) { return '"' + s + '"'; } string to_string(const char* s) { return to_string((string) s); } string to_string(bool b) { return (b ? "true" : "false"); } string to_string(char c){ string s = {c}; return s; } std::ostream &operator<<(std::ostream &dest, LL value) { std::ostream::sentry s(dest); if (s) { LL tmp = value < 0 ? -value : value; char buffer[128]; char *d = std::end(buffer); do { --d; *d = "0123456789"[tmp % 10]; tmp /= 10; } while (tmp != 0); if (value < 0) { --d; *d = '-'; } int len = std::end(buffer) - d; if (dest.rdbuf()->sputn(d, len) != len) { dest.setstate(std::ios_base::badbit); } } return dest; } string to_string(LL v){ stringstream ss; ss << v; return ss.str(); } string to_string(vector v) { bool first = true; string res = "{"; for (int i = 0; i < static_cast(v.size()); i++) { if (!first) { res += ", "; } first = false; res += to_string(v[i]); } res += "}"; return res; } template string to_string(bitset v) { string res = ""; for (size_t i = 0; i < N; i++) { res += static_cast('0' + v[i]); } return res; } template string to_string(A v) { bool first = true; string res = "{"; for (const auto &x : v) { if (!first) { res += ", "; } first = false; res += to_string(x); } res += "}"; return res; } template string to_string(pair p) { return "(" + to_string(p.first) + ", " + to_string(p.second) + ")"; } template string to_string(tuple p) { return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ")"; } template string to_string(tuple p) { return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ", " + to_string(get<3>(p)) + ")"; } void debug_out() { cerr << '\n'; } template void debug_out(Head H, Tail... T) { cerr << " " << to_string(H); debug_out(T...); } #ifdef LOCAL #define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__) #else #define debug(...) 42 #endif // tourist set end templatebool chmax(T &a, const T &b) { if (abool chmin(T &a, const T &b) { if (b()) #define MP make_pair #define p_yes() p("Yes") #define p_no() p("No") #define possible() p("Possible") #define impossible() p("Impossible") void yes(){p_yes(); exit(0);} void no(){p_no(); exit(0);} ll SUM(VI& V){ return accumulate(ALL(V), 0LL); } ll MIN(VI& V){return *min_element(ALL(V));} ll MAX(VI& V){return *max_element(ALL(V));} void print_vector(VI& V, ll offset=0){ ll n = V.size(); rep(i, n){ if(i) cout << ' '; cout << V[i]+offset; } cout << endl; } ll gcd(ll a,ll b){ if(b == 0) return a; return gcd(b,a%b); } ll lcm(ll a,ll b){ ll g = gcd(a,b); return a / g * b; } // long double using ld = long double; #define EPS (1e-14) #define equals(a,b) (fabs((a)-(b)) < EPS) // 小さい順に取り出すpriority queue using inverse_priority_queue = priority_queue, greater >; int popcount(ll t){ return __builtin_popcountll(t); } const ll mod = 1e9 + 7; // const ll mod = 998244353; const ll inf = 1e18; const double PI = acos(-1); // [a/b] (繰り上げ) ll ceil_div(ll a, ll b){ return (a+b-1)/b; } ll string_to_ll(string s){ return atoll(s.c_str()); } // snuke's mint // auto mod int // https://youtu.be/L8grWxBlIZ4?t=9858 // https://youtu.be/ERZuLAxZffQ?t=4807 : optimize // https://youtu.be/8uowVvQ_-Mo?t=1329 : division // const int mod = 1000000007; struct mint { ll x; // typedef long long ll; mint(ll x=0):x((x%mod+mod)%mod){} mint operator-() const { return mint(-x);} mint& operator+=(const mint a) { if ((x += a.x) >= mod) x -= mod; return *this; } mint& operator-=(const mint a) { if ((x += mod-a.x) >= mod) x -= mod; return *this; } mint& operator*=(const mint a) { (x *= a.x) %= mod; return *this; } mint operator+(const mint a) const { mint res(*this); return res+=a; } mint operator-(const mint a) const { mint res(*this); return res-=a; } mint operator*(const mint a) const { mint res(*this); return res*=a; } mint pow(ll t) const { if (!t) return 1; mint a = pow(t>>1); a *= a; if (t&1) a *= *this; return a; } // for prime mod mint inv() const { return pow(mod-2); } mint& operator/=(const mint a) { return (*this) *= a.inv(); } mint operator/(const mint a) const { mint res(*this); return res/=a; } }; //#include //using namespace atcoder; // 忘れがち int main(){ cin.tie(0); ios::sync_with_stdio(false); // input ll N; cin>>N; LL a=0; LL b=0; const ll ten = 10000000000; // 1e10 rep(i,N){ string s;cin>>s; ll sign=1; if(s[0]=='-'){ sign = -1; s = s.substr(1); } auto pos = s.find("."); if(pos==string::npos){ s = s + ".0"; pos = s.find("."); } string h = s.substr(0,pos); // head string t = s.substr(pos+1); // tail debug(t, t.size()); ll LOOP=10-t.size(); while(LOOP--){ t += "0"; } debug(h,t); a += sign * stoll(h); b += sign * stoll(t); } debug(a,b); // 小数点部を正にする a -= 100; b += 100 * ten; debug(a,b); // bで溢れた分をaに戻す ll r = b/ten; b %= ten; debug(r); a += r; debug(a,b); if(a<0 && b>0){ // 負.正になっているので調整必要 a++; b = ten-b; // やばみ if(a==0)cout<<'-'; } // b=1234 => 0000001234にしたい ll LOOP = 10-to_string(b).size(); debug(b); debug(to_string(b).size()); debug(LOOP); string tail=""; while(LOOP--)tail += "0"; tail += to_string(b); debug(a,b); debug(tail); cout << (ll)a << '.' << tail << endl; return 0; }