Submission #473346

#	Time	Username	Problem	Language	Result	Execution time	Memory
473346		AbdoMo	San (COCI17_san)	C++17	24 / 120	818 ms	65540 KiB

san

#include<bits/stdc++.h>
#define int long long
#define ll long long
#define pb push_back
const int mod = 1e9+7;
using namespace std;
bool comp(string a,string b)
{
    if(a.size()==b.size())
    {
        return a<b;
    }
    return a.size()<b.size();
}
int n,k;
int arr[50][2];
map<int,bool>cal[50];
map<int,int>dp[50];
int rec(int i,int x)
{
    int ans=0;
    if(i == n-1)
    {
        dp[i][x]=(x>=k);
        cal[i][x]=1;
        return(x>=k);
    }
    bool flag=0;
    if(x>=k)ans++;
    for(int j=i+1;j<n;j++)
    {
        if(arr[j][0]>=arr[i][0])
        {
            if(cal[j][x+arr[j][1]])
            {
                ans+=dp[j][x+arr[j][1]];
            }
            else
            {
                dp[j][x+arr[j][1]]=rec(j,x+arr[j][1]);
                cal[j][x+arr[j][1]]=1;;
            }
            ans+=dp[j][x+arr[j][1]];
        }
    }
    dp[i][x]=ans;
    cal[i][x]=1;
    return ans;
}
void solve(){
    cin>>n>>k;
    for(int i=0;i<n;i++)
    {
        cin>>arr[i][0]>>arr[i][1];
    }
    int ans=0;
    for(int i=0;i<n;i++)
    {
        ans+=rec(i,arr[i][1]);
    }
    cout<< ans;
}
int32_t main(){
	int t=1;
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
   // cin>>t;
	while(t--){solve();}
	return 0;
}

Compilation message (stderr)

san.cpp: In function 'long long int rec(long long int, long long int)':
san.cpp:28:10: warning: unused variable 'flag' [-Wunused-variable]
   28 |     bool flag=0;
      |          ^~~~

• Subtask 1: 24 / 24
• Subtask 2: 0 / 24
• Subtask 3: 0 / 24
• Subtask 4: 0 / 24
• Subtask 5: 0 / 24