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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#606446#5275. Joking?ship2077WA 1ms3992kbC++232.4kb2024-10-03 08:30:432024-10-03 08:30:43

Judging History

你现在查看的是最新测评结果

  • [2024-10-03 08:30:43]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:3992kb
  • [2024-10-03 08:30:43]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
mt19937 mt(time(NULL));
int rnd(int l,int r){return mt()%(r-l+1)+l;}
int n,k,ans[6][125],tmpxl[125],tmpxr[125];
long long dp[6][125];bool vis[6];
double query(){
    long long Min=1ll<<60,Max=0;
    auto dfs=[&](auto self,auto x,auto lst){
        if (x>n){
            Min=min(Min,dp[n][k]);
            Max=max(Max,dp[n][k]);
            return;
        }
        for (int p=1;p<=n;p++)
            if (!vis[p]){
                vis[p]=1;
                for (int i=1,j=1;i<=k;i++){
                    while (j<=k&&ans[lst][j]<=ans[p][i])
                        j++;
                    dp[x][i]=dp[x-1][j-1];
                }
                for (int i=1;i<=k;i++) dp[x][i]+=dp[x][i-1];
                self(self,x+1,p);
                vis[p]=0;
            }
    };
    for (int i=0;i<=k;i++) dp[0][i]=1;
    dfs(dfs,1,0); return 1.*(Max-Min)/Max;
}
void solve(){
    k=16;int idx=0;
    for (int j=1;j<=k;j++) if (j&1)
        { for (int i=1;i<=n;i++) ans[i][j]=++idx;}
    else{ for (int i=n;i;i--) ans[i][j]=++idx;}
    swap(ans[1][1],ans[2][1]);
    double res=query();
    while (res>=0.0001&&0){
        cerr<<res<<"?"<<endl;
        int xl=rnd(1,n),yl=rnd(1,k),xr=rnd(1,n),yr=rnd(1,k);
        for (int i=1;i<=k;i++) tmpxl[i]=ans[xl][i];
        for (int i=1;i<=k;i++) tmpxr[i]=ans[xr][i];
        swap(ans[xl][yl],ans[xr][yr]);
        sort(ans[xl]+1,ans[xl]+k+1);
        sort(ans[xr]+1,ans[xr]+k+1);
        double tmp=query();
        if (res>tmp) {res=tmp;continue;}
        for (int i=1;i<=k;i++) ans[xl][i]=tmpxl[i];
        for (int i=1;i<=k;i++) ans[xr][i]=tmpxr[i];
    }
    cerr<<res<<"!"<<endl;
    printf("%d\n",k);
    for (int i=1;i<=n;i++)
        for (int j=1;j<=k;j++)
            printf("%d%c",ans[i][j]," \n"[j==k]);
    return;
    for (int i=1;i<=n;i++){
        for (int j=1;j<k;j++)
            printf("%d ",ans[i][j]);
        printf("%d\\n",ans[i][k]);
    }
}
int main(){
    scanf("%d",&n);
    solve();return 0;
    if (n==2) return puts("2\n1 4\n2 3"),0;
    if (n==3) return puts("6\n1 5 10 11 13 17\n3 4 7 12 15 16\n2 6 8 9 14 18"),0;
    if (n==4) return puts("12\n1 8 11 14 19 22 27 30 35 38 41 48\n2 7 10 15 18 23 26 31 34 39 42 47\n3 6 12 13 17 24 25 32 36 37 43 46\n4 5 9 16 20 21 28 29 33 40 44 45"),0;
    if (n==5) solve();
    return 0;
}

Details

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Test #1:

score: 0
Wrong Answer
time: 1ms
memory: 3992kb

input:

2

output:

16
2 4 5 8 9 12 13 16 17 20 21 24 25 28 29 32
1 3 6 7 10 11 14 15 18 19 22 23 26 27 30 31

result:

wrong answer n = 2, max_relative_diff = 1.550%