답안 #891945

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
891945	2023-12-24T13:43:45 Z	alexander707070	Chorus (JOI23_chorus)	C++14	40 / 100	764 ms	96416 KB

chorus

#include<bits/stdc++.h>
#define MAXN 5007
using namespace std;

const int inf=1e15;

int n,k;
long long ans;
char s[MAXN];

long long dp[MAXN][MAXN];
int opt[MAXN][MAXN],pref[MAXN];
long long sum[MAXN][MAXN],sum2[MAXN][MAXN];

long long cost(int l,int r){
    if((r-l+1)%2!=0)return inf;

    return (sum[(r-l+1)/2][(l+r)/2] - sum[0][(l+r)/2-(r-l+1)/2] + sum2[(r-l+1)/2-1][(l+r)/2+1])/2;    
}

void solve(int l,int r,int optl,int optr,int k){
    if(l>r)return;

    int mid=(l+r)/2;
    dp[mid][k]=inf;

    for(int i=mid;i>=1;i--){
        if(dp[i-1][k-1]+cost(i,mid)<dp[mid][k]){
            dp[mid][k]=dp[i-1][k-1]+cost(i,mid);
            opt[mid][k]=i;
        }
    }

    solve(l,mid-1,optl,opt[mid][k],k);
    solve(mid+1,r,opt[mid][k],optr,k);
}

int main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n>>k; 
    n*=2;
    cin>>(s+1);

    for(int i=1;i<=n;i++){
        if(s[i]=='A')pref[i]++;
        else pref[i]--;
        pref[i]+=pref[i-1];
    }

    for(int i=0;i<=n/2;i++){
        for(int f=1;f<=n;f++){
            sum[i][f]=max(i-pref[f],0);
            if(i>0)sum[i][f]+=sum[i-1][f-1];

            sum2[i][f]=max(i-pref[f],0);
            if(i>0)sum2[i][f]+=sum2[i-1][f+1];
        }
    }

    for(int i=1;i<=n;i++){
        dp[i][0]=inf;
    }

    ans=inf;
    for(int i=1;i<=k;i++){
        solve(1,n,1,n,i);
        ans=min(ans,dp[n][i]);
    }

    cout<<ans<<"\n";

    return 0;
}

Compilation message

chorus.cpp:5:15: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+15' to '2147483647' [-Woverflow]
    5 | const int inf=1e15;
      |               ^~~~

Subtask #1
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	4440 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6492 KB	Output is correct
8	Correct	1 ms	6492 KB	Output is correct
9	Correct	1 ms	6492 KB	Output is correct
10	Correct	1 ms	6744 KB	Output is correct
11	Correct	1 ms	6488 KB	Output is correct
12	Correct	2 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6628 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	4440 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6492 KB	Output is correct
8	Correct	1 ms	6492 KB	Output is correct
9	Correct	1 ms	6492 KB	Output is correct
10	Correct	1 ms	6744 KB	Output is correct
11	Correct	1 ms	6488 KB	Output is correct
12	Correct	2 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6628 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct
17	Correct	16 ms	33884 KB	Output is correct
18	Correct	167 ms	96144 KB	Output is correct
19	Correct	433 ms	96156 KB	Output is correct
20	Correct	15 ms	95836 KB	Output is correct
21	Correct	17 ms	95836 KB	Output is correct
22	Correct	752 ms	96408 KB	Output is correct
23	Correct	749 ms	96336 KB	Output is correct
24	Correct	28 ms	95836 KB	Output is correct
25	Correct	764 ms	96212 KB	Output is correct
26	Correct	636 ms	96416 KB	Output is correct
27	Correct	277 ms	96084 KB	Output is correct
28	Correct	281 ms	95948 KB	Output is correct

Subtask #3
0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	4440 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6492 KB	Output is correct
8	Correct	1 ms	6492 KB	Output is correct
9	Correct	1 ms	6492 KB	Output is correct
10	Correct	1 ms	6744 KB	Output is correct
11	Correct	1 ms	6488 KB	Output is correct
12	Correct	2 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6628 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct
17	Correct	16 ms	33884 KB	Output is correct
18	Correct	167 ms	96144 KB	Output is correct
19	Correct	433 ms	96156 KB	Output is correct
20	Correct	15 ms	95836 KB	Output is correct
21	Correct	17 ms	95836 KB	Output is correct
22	Correct	752 ms	96408 KB	Output is correct
23	Correct	749 ms	96336 KB	Output is correct
24	Correct	28 ms	95836 KB	Output is correct
25	Correct	764 ms	96212 KB	Output is correct
26	Correct	636 ms	96416 KB	Output is correct
27	Correct	277 ms	96084 KB	Output is correct
28	Correct	281 ms	95948 KB	Output is correct
29	Runtime error	13 ms	348 KB	Execution killed with signal 11
30	Halted	0 ms	0 KB	-

Subtask #4
0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	4440 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6492 KB	Output is correct
8	Correct	1 ms	6492 KB	Output is correct
9	Correct	1 ms	6492 KB	Output is correct
10	Correct	1 ms	6744 KB	Output is correct
11	Correct	1 ms	6488 KB	Output is correct
12	Correct	2 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6628 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct
17	Correct	16 ms	33884 KB	Output is correct
18	Correct	167 ms	96144 KB	Output is correct
19	Correct	433 ms	96156 KB	Output is correct
20	Correct	15 ms	95836 KB	Output is correct
21	Correct	17 ms	95836 KB	Output is correct
22	Correct	752 ms	96408 KB	Output is correct
23	Correct	749 ms	96336 KB	Output is correct
24	Correct	28 ms	95836 KB	Output is correct
25	Correct	764 ms	96212 KB	Output is correct
26	Correct	636 ms	96416 KB	Output is correct
27	Correct	277 ms	96084 KB	Output is correct
28	Correct	281 ms	95948 KB	Output is correct
29	Runtime error	13 ms	348 KB	Execution killed with signal 11
30	Halted	0 ms	0 KB	-

Subtask #5
0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	6492 KB	Output is correct
2	Correct	1 ms	6492 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	6492 KB	Output is correct
5	Correct	1 ms	4440 KB	Output is correct
6	Correct	1 ms	6492 KB	Output is correct
7	Correct	1 ms	6492 KB	Output is correct
8	Correct	1 ms	6492 KB	Output is correct
9	Correct	1 ms	6492 KB	Output is correct
10	Correct	1 ms	6744 KB	Output is correct
11	Correct	1 ms	6488 KB	Output is correct
12	Correct	2 ms	6492 KB	Output is correct
13	Correct	1 ms	6492 KB	Output is correct
14	Correct	1 ms	6492 KB	Output is correct
15	Correct	1 ms	6628 KB	Output is correct
16	Correct	1 ms	6492 KB	Output is correct
17	Correct	16 ms	33884 KB	Output is correct
18	Correct	167 ms	96144 KB	Output is correct
19	Correct	433 ms	96156 KB	Output is correct
20	Correct	15 ms	95836 KB	Output is correct
21	Correct	17 ms	95836 KB	Output is correct
22	Correct	752 ms	96408 KB	Output is correct
23	Correct	749 ms	96336 KB	Output is correct
24	Correct	28 ms	95836 KB	Output is correct
25	Correct	764 ms	96212 KB	Output is correct
26	Correct	636 ms	96416 KB	Output is correct
27	Correct	277 ms	96084 KB	Output is correct
28	Correct	281 ms	95948 KB	Output is correct
29	Runtime error	13 ms	348 KB	Execution killed with signal 11
30	Halted	0 ms	0 KB	-

답안 #891945

Compilation message

Subtask #1 16.0 / 16.0

Subtask #2 24.0 / 24.0

Subtask #3 0 / 21.0

Subtask #4 0 / 26.0

Subtask #5 0 / 13.0

Subtask #1
16.0 / 16.0

Subtask #2
24.0 / 24.0

Subtask #3
0 / 21.0

Subtask #4
0 / 26.0

Subtask #5
0 / 13.0