제출 #1345635

#제출 시각아이디문제언어결과실행 시간메모리
1345635doantaolaaidiZoltan (COCI16_zoltan)C++20
21 / 140
31 ms6352 KiB
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define AC "test"
#define foru(i, l, r) for (int i = (l); i <= (r); i++)
#define ford(i, l, r) for (int i = (l); i >= (r); i--)
#define fi first
#define se second

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vii;
typedef vector<ll> vll;

const ll inf = 1e9 + 7;
const ll linf = 1e18 + 7;
const int mod = 1e9 + 7;
const int maxn = 2e5 + 7;
const int base = 31;

void fastIO(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
}

ll mul(ll a, ll b){
    a%=mod;
    ll res = 0;
    while (b){
        if (b%2) res = (res + a)%mod;
        a = (a + a)%mod;
        b/=2;
    }
    return res;
}

ll Pow(ll a, ll b){
    ll ans = 1;
    while (b){
        if (b % 2) ans = mul(ans, a);
        a = mul(a, a);
        b/=2;
    }
    return ans;
}

int getup[maxn], getdown[maxn], n, a[maxn], b[maxn], up[maxn], down[maxn], ansup, ansdown, cntup[maxn], cntdown[maxn], posup[maxn], posdown[maxn], res, cnt;

void inp(){
    cin >> n;
    foru(i, 1, n){
        cin >> a[i];
        b[i] = inf - a[i];
    }
    cntup[0] = cntdown[0] = 1;
    up[1] = 0;
    down[1] = 0;
    ansup = 0;
    ansdown = 0;
    ford(i, n, 1){
        int it = lower_bound(up + 1, up + ansup + 1, a[i]) - up;
        up[it] = a[i];
        if (it >= ansup){
            ansup = it;
            cntup[it] = cntup[it - 1];
        }
        else cntup[it] = (cntup[it] % mod + cntup[it - 1] % mod) % mod;
        getup[i] = cntup[it - 1];
        posup[i] = it;
        it = lower_bound(down + 1, down + ansdown + 1, b[i]) - down;
        down[it] = b[i];
        if (it >= ansdown){
            ansdown = it;
            cntdown[it] = cntdown[it - 1];
        }
        else cntdown[it] = (cntdown[it] % mod + cntdown[it - 1] % mod) % mod;;
        getdown[i] = cntdown[it - 1];
        posdown[i] = it;
    }
    foru(i, 1, n){
        res = max(res, posup[i] + posdown[i]);
    }
    cout << res - 1 << " ";
    foru(i, 1, n){
        if (posup[i] + posdown[i] == res){
            cnt = ((cnt % mod) + mul(getup[i], getdown[i]))%mod;
        }
    }
    cout << mul(Pow(2, n - res + 1), cnt);
}

int main(){
    fastIO();
    if (fopen(AC".inp", "r")){
        freopen(AC".inp", "r", stdin);
        freopen(AC".out", "w", stdout);
    }
    inp();
}

컴파일 시 표준 에러 (stderr) 메시지

zoltan.cpp: In function 'int main()':
zoltan.cpp:96:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |         freopen(AC".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
zoltan.cpp:97:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |         freopen(AC".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
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