結果

問題 No.1830 Balanced Majority
ユーザー rianoriano
提出日時 2021-12-25 13:40:31
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 4,166 bytes
コンパイル時間 1,596 ms
コンパイル使用メモリ 167,596 KB
実行使用メモリ 25,476 KB
平均クエリ数 7.54
最終ジャッジ日時 2024-10-08 10:30:36
合計ジャッジ時間 3,764 ms
ジャッジサーバーID
(参考情報)
judge3 / judge4
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 23 ms
24,568 KB
testcase_01 AC 20 ms
24,824 KB
testcase_02 WA -
testcase_03 WA -
testcase_04 AC 22 ms
25,208 KB
testcase_05 AC 20 ms
24,824 KB
testcase_06 WA -
testcase_07 AC 22 ms
25,220 KB
testcase_08 AC 21 ms
24,964 KB
testcase_09 AC 21 ms
24,836 KB
testcase_10 AC 20 ms
24,836 KB
testcase_11 WA -
testcase_12 WA -
testcase_13 WA -
testcase_14 AC 24 ms
24,836 KB
testcase_15 AC 23 ms
24,836 KB
testcase_16 AC 22 ms
24,580 KB
testcase_17 AC 22 ms
24,836 KB
testcase_18 AC 22 ms
24,964 KB
testcase_19 AC 22 ms
25,220 KB
testcase_20 WA -
testcase_21 WA -
testcase_22 WA -
testcase_23 WA -
testcase_24 WA -
testcase_25 WA -
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define rep(i,n) for(int i=0;i<n;i++)
#define rrep(i,n) for(int i=n-1;i>=0;i--)
#define rrep2(i,n,k) for(int i=n-1;i>=n-k;i--)
#define vll(n,i) vector<long long>(n,i)
#define v2ll(n,m,i) vector<vector<long long>>(n,vll(m,i))
#define v3ll(n,m,k,i) vector<vector<vector<long long>>>(n,v2ll(m,k,i))
#define v4ll(n,m,k,l,i) vector<vector<vector<vector<long long>>>>(n,v3ll(m,k,l,i))
#define all(v) v.begin(),v.end()
#define chmin(k,m) k = min(k,m)
#define chmax(k,m) k = max(k,m)
#define Pr pair<ll,ll>
#define Tp tuple<ll,ll,ll>
#define riano_ std::ios::sync_with_stdio(false);std::cin.tie(nullptr)
using Graph = vector<vector<int>>;

const ll mod = 998244353;
template<uint64_t mod>
struct modint{
    uint64_t val;
    constexpr modint(const int64_t val_=0) noexcept:val((val_%int64_t(mod)+int64_t(mod))%int64_t(mod)){}
    constexpr modint operator-() const noexcept{
        return modint(*this)=mod-val;
    }
    constexpr modint operator+(const modint rhs) const noexcept{
        return modint(*this)+=rhs;
    }
    constexpr modint operator-(const modint rhs) const noexcept{
        return modint(*this)-=rhs;
    }
    constexpr modint operator*(const modint rhs) const noexcept{
        return modint(*this)*=rhs;
    }
    constexpr modint operator/(const modint rhs) const noexcept{
        return modint(*this)/=rhs;
    }
    constexpr modint &operator+=(const modint rhs) noexcept{
        val+=rhs.val;
        val-=((val>=mod)?mod:0);
        return (*this);
    }
    constexpr modint &operator-=(const modint rhs) noexcept{
        val+=((val<rhs.val)?mod:0);
        val-=rhs.val;
        return (*this);
    }
    constexpr modint &operator*=(const modint rhs) noexcept{
        val=val*rhs.val%mod;
        return (*this);
    }
    constexpr modint &operator/=(modint rhs) noexcept{
        uint64_t ex=mod-2;
        modint now=1;
        while(ex){
            now*=((ex&1)?rhs:1);
            rhs*=rhs,ex>>=1;
        }
        return (*this)*=now;
    }
    modint & operator++(){
        val++;
        if (val == mod) val = 0;
        return *this;
    }
    modint operator++(int){
        modint<mod> res = *this;
        ++*this;
        return res;
    }
    constexpr bool operator==(const modint rhs) noexcept{
        return val==rhs.val;
    }
    constexpr bool operator!=(const modint rhs) noexcept{
        return val!=rhs.val;
    }
    friend constexpr ostream &operator<<(ostream& os,const modint x) noexcept{
        return os<<(x.val);
    }
    friend constexpr istream &operator>>(istream& is,modint& x) noexcept{
        uint64_t t;
        is>>t,x=t;
        return is;
    }
};
typedef modint<mod> mint;
mint pw(long long a,long long b,long long m = mod){
    if(a%m==0) return mint(0);
    if(b==0) return mint(1);
    else if(b%2==0){
        long long x = pw(a,b/2,m).val;
        return mint(x*x);
    }
    else{
        long long x = pw(a,b-1,m).val;
        return mint(a*x);
    }
}
mint modinv(long long a, long long m = mod) {
    long long b = m, u = 1, v = 0;
    while (b) {
        long long t = a / b;
        a -= t * b; swap(a, b);
        u -= t * v; swap(u, v);
    }
    u %= m;
    return mint(u);
}
#define vm(n,i) vector<mint>(n,i)
#define v2m(n,m,i) vector<vector<mint>>(n,vm(m,i))
#define v3m(n,m,k,i) vector<vector<vector<mint>>>(n,v2m(m,k,i))
#define v4m(n,m,k,l,i) vector<vector<vector<vector<mint>>>>(n,v3m(m,k,l,i))

int main() {
    riano_; //ll ans = 0;
	ll N; cin >> N;
    ll l = 1,r = N-1,sl,sr;
    cout << "? " << l << endl;
    cin >> sl; sl = sl*2-1;
    cout << "? " << r << endl;
    cin >> sr; sr = sr*2-(N-1);
    if(sl==sr){
        cout << "! " << l+1 << " " << r << endl;
        return 0;
    }
    int pm = 1;
    if(sl>0) pm = -1;
    while(l<r){
        ll c = (l+r)/2;
        //cの場合に検証
        cout << "? " << c << endl;
        cin >> sl; sl = sl*2-c;
        if(sl==0){
            l = c; r = c;
        }
        else if(sl*pm<0){//cが"l側"になる条件判定
            l = c;
        }
        else r = c;
    }
    cout << 1 << " " << N << endl;
    //cout << ans << endl;
}
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