50分求助

P1255 数楼梯

Cute_Catlady_yining @ 2024-02-16 10:25:56

用dfs做的,五个点TLE了,大佬改改代码吧

#include<bits/stdc++.h>
#define int long long
using namespace std;
int c;
void dfs(int syj){
    if(syj==0){
        c++;
        return;
    }
    if(syj<0) return;
    for(int i=1;i<=2;i++) dfs(syj-i);
}
signed main(){
    int x;
    cin>>x;
    dfs(x);
    cout<<c;
    return 0;
}

by Abelxxyy @ 2024-02-19 09:39:45

递推优化,要用高精


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