Submission #831513

#	Time	Username	Problem	Language	Result	Execution time	Memory
831513		MrDeboo	Catfish Farm (IOI22_fish)	C++17	17 / 100	1093 ms	239072 KiB

fish

#include "fish.h"
#include "bits/stdc++.h"
#define int long long
using namespace std;
int dp[311][311][311];
int vct[311][311];
int vctt[311][311];
vector<int>v[311];
int N;
int slv(int a,int b,int c){
    if(a==N)return 0;
    if(dp[a][b][c]!=-1)return dp[a][b][c];
    // cerr<<a<<' '<<b<<endl;
    int mx=0;
    int tot=0;
    for(auto &i:v[a]){
        if(i<=b)tot-=vct[a][i];
        if(i>max(b,c))tot+=vct[a-1][i];
        tot+=vct[a+1][i];
        mx=max(mx,slv(a+1,i,b)+tot);
    }
    return dp[a][b][c]=mx;
}
long long max_weights(int32_t n, int32_t m, std::vector<int32_t> x, std::vector<int32_t> y, std::vector<int32_t> w) {
    N=n;
    if(n>300){
        int g=0;
        for(auto &i:w)g+=i;
        return g;
    }
    memset(dp,-1,sizeof dp);
    for(int i=0;i<=n;i++)v[i].push_back(0);
    for(int i=0;i<m;i++){
        vct[x[i]][y[i]+1]=w[i];
        if(x[i])v[x[i]-1].push_back(y[i]+1);
        v[x[i]].push_back(y[i]+1);
        v[x[i]+1].push_back(y[i]+1);
    }
    for(int i=0;i<=n;i++)sort(v[i].begin(),v[i].end());
    for(int i=0;i<=n;i++)v[i].resize(unique(v[i].begin(),v[i].end())-v[i].begin());
    return slv(0,0,0);
}

• Subtask 1: 3 / 3
• Subtask 2: 0 / 6
• Subtask 3: 0 / 9
• Subtask 4: 14 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16