Submission #523724

#	Time	Username	Problem	Language	Result	Execution time	Memory
523724		vonatlus	Boat (APIO16_boat)	C++17	0 / 100	1 ms	332 KiB

boat

/// adil sultanov | vonat1us 

#pragma GCC optimize("O3")
//#pragma comment(linker, "/STACK:36777216")

#include<bits/stdc++.h>

#define x first
#define y second
#define pb push_back
#define sz(x) (int) x.size()
#define all(z) (z).begin(), (z).end()
 
using namespace std;

using ll = long long;
using pii = pair<int, int>;                                   

const int MOD = 1e9 + 7; 
const int INF = 1e9 + 1e2;
  
void fin() {
#ifdef AM
    freopen(".in", "r", stdin);
#endif        
}                   

const bool flag = 0;

const int N = 1e5+10;

int dp[N][2];

int add(int a, int b) {
    a += b;
    if (a >= MOD) a -= MOD;
    return a;
}

void ma1n() {
    int n;
    cin >> n;
    vector<int> a(n), b(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i] >> b[i];
    }
    dp[0][0] = dp[0][1] = 1;
    for (int i = 1; i < n; ++i) {
        dp[i][0] = add(dp[i-1][1], dp[i-1][0]);
        for (int j = 0; j < i; ++j) {
            if (a[j] < a[i]) {
                dp[i][1] = add(dp[i][1], dp[j][1]);
            }    
        }
    }
    cout << add(dp[n-1][0], dp[n-1][1]);
} 

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr), fin();
    int ts = 1;
    if (flag) {
        cin >> ts;
    }
    while (ts--) {
        ma1n(); 
    }
    return 0;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42