QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#772931#7006. Rikka with SubsequencesCryingAC ✓476ms40292kbC++141.4kb2024-11-22 23:02:032024-11-22 23:02:03

Judging History

你现在查看的是最新测评结果

  • [2024-11-22 23:02:03]
  • 评测
  • 测评结果:AC
  • 用时:476ms
  • 内存:40292kb
  • [2024-11-22 23:02:03]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 210,mod = 1e9+7;
int addv(int x,int y){return (x+y>=mod)?(x+y-mod):(x+y);}
int subv(int x,int y){return (x>=y)?(x-y):(x-y+mod);}
void add(int& x,int y){x = addv(x,y);}
void sub(int& x,int y){x = subv(x,y);}
int qpow(int a,int n){
    int res = 1; a%=mod;
    while(n){
        if(n&1)res = 1ll*res*a%mod;
        n>>=1; a = 1ll*a*a%mod;
    }
    return res;
}
int qinv(int a){return qpow(a,mod-2);}
//
int T,n,a[N],e[N][N],f[N][N][N],g[N][N],h[N][N],ans;

void solve(){
    cin>>n;
    for(int i=1;i<=n;i++)cin>>a[i];
    memset(e,0,sizeof e);
    for(int i=1;i<=n;i++){
        string s; cin>>s; for(int j=1;j<=n;j++)e[i][j] = s[j-1]-'0';
    }
    memset(f,0,sizeof f); 
    memset(g,0,sizeof g);
    ans = 0;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++)for(int k=1;k<=n;k++)if(a[i] == a[j] && a[j] == a[k]){
            f[i][j][k] = addv(g[j][k],1);
            add(ans,f[i][j][k]);
        }
        memcpy(h,f[i],sizeof h);
        for(int j=1;j<=n;j++)for(int k=1;k<=n;k++)add(h[j][k],h[j][k-1]);
        for(int j=1;j<=n;j++)for(int k=1;k<=n;k++)add(h[j][k],h[j-1][k]);
        for(int j=1;j<=n;j++)for(int k=1;k<=n;k++)if(a[j] == a[k] && e[a[i]][a[j]]){
            add(g[j][k],h[j-1][k-1]);
        }
     }
    cout<<ans<<endl;
}

int main(){
    cin>>T;
    while(T--)solve();

    return 0;
}

这程序好像有点Bug,我给组数据试试?

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 40292kb

input:

1
4
1 2 1 2
1111
1111
1111
1111

output:

51

result:

ok single line: '51'

Test #2:

score: 0
Accepted
time: 476ms
memory: 40240kb

input:

20
195
4 5 4 3 2 4 3 5 1 5 4 3 4 3 1 5 4 4 5 2 2 2 2 4 1 5 3 4 1 1 1 2 1 1 5 5 4 5 4 5 5 4 5 2 1 2 5 4 5 1 1 3 1 2 2 3 3 5 2 3 3 1 4 4 2 4 2 4 3 4 1 1 1 4 3 5 1 1 3 2 2 5 1 3 1 5 1 5 5 3 5 3 3 2 5 1 3 2 4 1 5 5 1 3 3 2 4 2 3 3 3 4 1 3 3 3 5 5 1 1 4 2 5 1 2 5 4 3 5 1 5 5 5 4 2 2 5 3 2 3 4 1 3 2 1 5 3...

output:

806298135
541285042
48173297
222851978
875793336
100057791
156057874
129923599
551277543
874547790
544405786
653241411
521317929
370918040
803940504
969296122
806596012
469227084
338962879
194278629

result:

ok 20 lines