Submission #1226967

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226967		cpdreamer	Boat (APIO16_boat)	C++20	0 / 100	1 ms	324 KiB

boat

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
const long long INF = 1e17;
typedef long long ll;
const ll MOD = 998244353;
#define F first
#define pb push_back
#define S second
#define P pair
#define V vector
#define all(v) v.begin(), v.end()
typedef tree<int,null_type,less<int>,rb_tree_tag, tree_order_statistics_node_update> indexed_multiset;
void file() {
    freopen("input.txt","r",stdin);
    freopen("output.txt","w",stdout);
}

void solve() {
    int n;
    cin>>n;
    int A[n];
    int B[n];
    for (int i=0;i<n;i++) {
        cin>>A[i]>>B[i];
    }
    ll dp[n];
    dp[0]=1LL;
    ll ans=1;
    for (int i=1;i<n;i++) {
        dp[i]=1;
        for (int j=i-1;j>=0;j--) {
            if (A[j]<A[i]) {
                dp[i]+=dp[j];
            }
        }
        ans+=dp[i];
    }
    cout<<ans<<endl;

}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    //file();
    solve();
}

Compilation message (stderr)

boat.cpp: In function 'void file()':
boat.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen("input.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
boat.cpp:17:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     freopen("output.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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