Submission #1080350

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1080350	2024-08-29T09:01:54 Z	Victor	Ancient Books (IOI17_books)	C++17	50 / 100	107 ms	30804 KB

books

// #pragma GCC target ("avx,avx2,fma")
// #pragma GCC optimize ("Ofast,inline") // O1 - O2 - O3 - Os - Ofast
// #pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
#include "books.h"

using namespace std;

#define rep(i, a, b) for (ll i = (a); i < (b); ++i)
#define per(i, a, b) for (ll i = (b) - 1; i >= (a); --i)
#define trav(a, x) for (auto &a : x)

#define all(x) x.begin(), x.end()
#define sz(x) (ll)x.size()
#define pb push_back
#define debug(x) cout<<#x<<" = "<<x<<endl

#define umap unordered_map
#define uset unordered_set

typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;

typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<ll,pll> ppll;
typedef vector<ll> vll;
typedef vector<pll> vpll;
typedef vector<vll> vvll;

const ll INF = 1'000'000'007;

ll n;

long long minimum_walk(std::vector<int> p, int s) {
    n=sz(p);

    ll cycles=0;
    ll ans=0;
    vll vis(n,0);
    vll mxvals(n,-1);

    rep(i,0,n) {
        if(p[i]==i) continue;

        ans+=abs(i-p[i]);
        if(vis[i]) continue;
        ++cycles;

        ll j=i;
        ll mx=j;
        while(!vis[j]) {
            vis[j]=1;
            j=p[j];
            mx=max(mx,j);
        }

        mxvals[i]=mx;
    }

    ll mx=0;
    //cout<<ans<<endl;
    rep(i,0,n) {
        //cout<<"i = "<<i<<" mxvals = "<<mxvals[i]<<endl;
        if(mxvals[i]!=-1) {
            //cout<<"i = "<<i<<" mx = "<<mx<<endl;
            if(i) ans+=2*max(0LL,i-mx);
            //cout<<123<<endl;
            mx=max(mx,mxvals[i]);
        }
    }
    

    //cout<<ans<<endl;
    //cout<<cycles<<endl;


    return ans;
}

/**
#include <cstdio>
#include <vector>
#include <cassert>
// BEGIN SECRET
#include <string>
// END SECRET7
x   
using namespace std;

int main() {
	int n, s;
	assert(2 == scanf("%d %d", &n, &s));

	vector<int> p((unsigned) n);
	for(int i = 0; i < n; i++)
		assert(1 == scanf("%d", &p[(unsigned) i]));

	long long res = minimum_walk(p, s);
	printf("%lld\n", res);
	return 0;
}
/**/

Compilation message

books.cpp:106:1: warning: "/*" within comment [-Wcomment]
  106 | /**/
      |

Subtask #1
12.0 / 12.0

#	Verdict	Memory	Grader output
1	Correct	344 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	348 KB	Output is correct
5	Correct	348 KB	Output is correct
6	Correct	348 KB	Output is correct
7	Correct	348 KB	Output is correct
8	Correct	440 KB	Output is correct
9	Correct	428 KB	Output is correct
10	Correct	348 KB	Output is correct
11	Correct	344 KB	Output is correct
12	Correct	348 KB	Output is correct
13	Correct	348 KB	Output is correct
14	Correct	344 KB	Output is correct
15	Correct	348 KB	Output is correct
16	Correct	348 KB	Output is correct
17	Correct	432 KB	Output is correct
18	Correct	344 KB	Output is correct

Subtask #2
10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	440 KB	Output is correct
9	Correct	0 ms	428 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	344 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	344 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	432 KB	Output is correct
18	Correct	0 ms	344 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	436 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	1 ms	600 KB	Output is correct
29	Correct	0 ms	440 KB	Output is correct

Subtask #3
28.0 / 28.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	440 KB	Output is correct
9	Correct	0 ms	428 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	344 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	344 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	432 KB	Output is correct
18	Correct	0 ms	344 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	436 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	1 ms	600 KB	Output is correct
29	Correct	0 ms	440 KB	Output is correct
30	Correct	99 ms	30548 KB	Output is correct
31	Correct	103 ms	30432 KB	Output is correct
32	Correct	73 ms	30432 KB	Output is correct
33	Correct	83 ms	30556 KB	Output is correct
34	Correct	82 ms	30432 KB	Output is correct
35	Correct	85 ms	30444 KB	Output is correct
36	Correct	76 ms	30628 KB	Output is correct
37	Correct	73 ms	30560 KB	Output is correct
38	Correct	88 ms	30552 KB	Output is correct
39	Correct	80 ms	30576 KB	Output is correct
40	Correct	99 ms	30544 KB	Output is correct
41	Correct	93 ms	30544 KB	Output is correct
42	Correct	102 ms	30804 KB	Output is correct
43	Correct	107 ms	30800 KB	Output is correct

Subtask #4
0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	348 KB	3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2	Halted	0 ms	0 KB	-

Subtask #5
0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	344 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	440 KB	Output is correct
9	Correct	0 ms	428 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	344 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	344 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	432 KB	Output is correct
18	Correct	0 ms	344 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	0 ms	348 KB	Output is correct
21	Correct	0 ms	348 KB	Output is correct
22	Correct	0 ms	348 KB	Output is correct
23	Correct	0 ms	348 KB	Output is correct
24	Correct	1 ms	348 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	436 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	1 ms	600 KB	Output is correct
29	Correct	0 ms	440 KB	Output is correct
30	Correct	99 ms	30548 KB	Output is correct
31	Correct	103 ms	30432 KB	Output is correct
32	Correct	73 ms	30432 KB	Output is correct
33	Correct	83 ms	30556 KB	Output is correct
34	Correct	82 ms	30432 KB	Output is correct
35	Correct	85 ms	30444 KB	Output is correct
36	Correct	76 ms	30628 KB	Output is correct
37	Correct	73 ms	30560 KB	Output is correct
38	Correct	88 ms	30552 KB	Output is correct
39	Correct	80 ms	30576 KB	Output is correct
40	Correct	99 ms	30544 KB	Output is correct
41	Correct	93 ms	30544 KB	Output is correct
42	Correct	102 ms	30804 KB	Output is correct
43	Correct	107 ms	30800 KB	Output is correct
44	Incorrect	0 ms	348 KB	3rd lines differ - on the 1st token, expected: '3304', found: '2744'
45	Halted	0 ms	0 KB	-

Submission #1080350

Compilation message

Subtask #1 12.0 / 12.0

Subtask #2 10.0 / 10.0

Subtask #3 28.0 / 28.0

Subtask #4 0 / 20.0

Subtask #5 0 / 30.0

Subtask #1
12.0 / 12.0

Subtask #2
10.0 / 10.0

Subtask #3
28.0 / 28.0

Subtask #4
0 / 20.0

Subtask #5
0 / 30.0