oj.uz

Submission #835298

# Submission time Handle Problem Language Result Execution time Memory
835298 2023-08-23T12:03:27 Z oscar1f Ancient Books (IOI17_books) C++17
20 / 100
 43 ms 8340 KB 
#include<bits/stdc++.h>
#include "books.h"

using namespace std;
using ll=long long;

const ll MAX_TAILLE=1000*1000+5,MAX_MEMO=1000+5,DECA=(1<<10),INFINI=1000*1000*1000;
ll nbVal,rep,posDeb,nbCompo,debInter,finInter,maxFin;
vector<ll> obj,listeCompo;
ll idCompo[MAX_TAILLE],finCompo[MAX_TAILLE],tailleCompo[MAX_TAILLE],debCompo[MAX_TAILLE];
ll arbreMin[2*DECA],arbreMax[2*DECA];
ll memo[MAX_MEMO][MAX_MEMO];

void DFS(ll pos) {
	if (idCompo[pos]==0) {
		idCompo[pos]=nbCompo;
		tailleCompo[nbCompo]++;
		DFS(obj[pos]);
	}
}

ll calcMin(ll deb,ll fin) {
    if (deb==fin) {
        return arbreMin[deb];
    }
    if (deb%2==1) {
        return min(arbreMin[deb],calcMin(deb+1,fin));
    }
    if (fin%2==0) {
        return min(arbreMin[fin],calcMin(deb,fin-1));
    }
    return calcMin(deb/2,fin/2);
}

ll calcMax(ll deb,ll fin) {
    if (deb==fin) {
        return arbreMax[deb];
    }
    if (deb%2==1) {
        return max(arbreMax[deb],calcMax(deb+1,fin));
    }
    if (fin%2==0) {
        return max(arbreMax[fin],calcMax(deb,fin-1));
    }
    return calcMax(deb/2,fin/2);
}

ll dyna(ll deb,ll fin) {
    if (deb<=debInter and fin>=finInter) {
        return 0;
    }
    if (memo[deb][fin]!=-1) {
        return memo[deb][fin];
    }
    memo[deb][fin]=INFINI;
    if (fin<nbVal-1) {
        if (calcMax(DECA+deb,DECA+fin)>fin) {
            memo[deb][fin]=min(memo[deb][fin],dyna(deb,fin+1));
        }
        else {
            memo[deb][fin]=min(memo[deb][fin],dyna(deb,fin+1)+2);
        }
    }
    if (deb>0) {
        if (calcMin(DECA+deb,DECA+fin)<deb) {
            memo[deb][fin]=min(memo[deb][fin],dyna(deb-1,fin));
        }
        else {
            memo[deb][fin]=min(memo[deb][fin],dyna(deb-1,fin)+2);
        }
    }
    return memo[deb][fin];
}

ll minimum_walk(vector<int> p, int s) {
	posDeb=s;
	nbVal=p.size();
	for (auto i:p) {
		obj.push_back(i);
	}
	for (ll i=nbVal-1;i>=0;i--) {
		if (idCompo[i]==0) {
			nbCompo++;
			DFS(i);
            finCompo[nbCompo]=i;
		}
        debCompo[idCompo[i]]=i;
		rep+=abs(i-obj[i]);
	}
	finInter=nbVal-1;
	while (finInter>=0 and tailleCompo[idCompo[finInter]]==1) {
		finInter--;
	}
    debInter=0;
    while (debInter<=nbVal-1 and tailleCompo[idCompo[debInter]]==1) {
        debInter++;
    }
    if (posDeb==0) {
        ll pos=0;
        while (pos<finInter) {
            maxFin=max(maxFin,finCompo[pos]);
            if (maxFin==pos) {
                rep+=2;
            }
            pos++;
        }
        return rep;
    }
    for (ll i=0;i<MAX_MEMO;i++) {
        for (ll j=0;j<MAX_MEMO;j++) {
            memo[i][j]=-1;
        }
    }
    for (ll i=0;i<2*DECA;i++) {
        arbreMin[i]=INFINI;
        arbreMax[i]=-INFINI;
    }
    for (ll i=0;i<nbVal;i++) {
        arbreMin[DECA+i]=debCompo[idCompo[i]];
        arbreMax[DECA+i]=finCompo[idCompo[i]];
    }
    for (ll i=DECA-1;i>0;i--) {
        arbreMin[i]=min(arbreMin[2*i],arbreMin[2*i+1]);
        arbreMax[i]=max(arbreMax[2*i],arbreMax[2*i+1]);
    }
    return rep+dyna(posDeb,posDeb);
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Incorrect 1 ms 212 KB 3rd lines differ - on the 1st token, expected: '8', found: '10'
4 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Incorrect 1 ms 212 KB 3rd lines differ - on the 1st token, expected: '8', found: '10'
4 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Incorrect 1 ms 212 KB 3rd lines differ - on the 1st token, expected: '8', found: '10'
4 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 8340 KB Output is correct
2 Correct 8 ms 8276 KB Output is correct
3 Correct 36 ms 8276 KB Output is correct
4 Correct 36 ms 8276 KB Output is correct
5 Correct 39 ms 8276 KB Output is correct
6 Correct 36 ms 8276 KB Output is correct
7 Correct 36 ms 8276 KB Output is correct
8 Correct 37 ms 8276 KB Output is correct
9 Correct 31 ms 8340 KB Output is correct
10 Correct 3 ms 8276 KB Output is correct
11 Correct 43 ms 8340 KB Output is correct
12 Correct 38 ms 8276 KB Output is correct
13 Correct 35 ms 8276 KB Output is correct
14 Correct 36 ms 8276 KB Output is correct
15 Correct 36 ms 8276 KB Output is correct
16 Correct 36 ms 8276 KB Output is correct
17 Correct 38 ms 8276 KB Output is correct
18 Correct 38 ms 8276 KB Output is correct
19 Correct 38 ms 8276 KB Output is correct
20 Correct 25 ms 8276 KB Output is correct

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Incorrect 1 ms 212 KB 3rd lines differ - on the 1st token, expected: '8', found: '10'
4 Halted 0 ms 0 KB -