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Submission #112508

# Submission time Handle Problem Language Result Execution time Memory
112508 2019-05-20T11:18:15 Z Mercenary Gondola (IOI14_gondola) C++14
50 / 100
 110 ms 3476 KB 
#include "gondola.h"
#include<bits/stdc++.h>
using namespace std;

typedef pair<int,int> ii;
typedef long long ll;
#define mp make_pair
const int maxl = 25e4 + 5;
const int mod = 1e9 + 7;


int valid(int n, int inputSeq[])
{
    int root = -1;
    vector<int> cnt(maxl,0);
    for(int i = 0 ; i < n ; ++i){
        if(inputSeq[i] <= n){
            root = i;
            break;
        }
    }
    if(root == -1)return 1;
    for(int j = (root + 1) % n , i = inputSeq[root] % n + 1 ; j != root ; j = (j + 1) % n , i = i % n + 1){
        if(cnt[inputSeq[j]]++ == 1)return 0;
        if(inputSeq[j] <= n && inputSeq[j] != i){
            return 0;
        }
    }
    return 1;
}

//----------------------

int replacement(int n, int gondolaSeq[], int replacementSeq[])
{
    assert(valid(n,gondolaSeq));
    vector<ii> a;
    for(int i = 0 ; i < n ; ++i){
        if(gondolaSeq[i] > n)a.push_back(mp(gondolaSeq[i],i));
    }
    sort(a.begin(),a.end());
    int now = 0;
    int l = 0;
    vector<int> avai , pos(maxl);
    int root = -1;
    for(int i = 0 ; i < n ; ++i){
        if(gondolaSeq[i] <= n){
            root = i;
            break;
        }
    }
//    printf("%d",root);
    for(int i = (root == -1 ? 1 : gondolaSeq[root]) , j = (root == -1 ? 0 : root) , cnt = n ; cnt-- ; j = (j + 1) % n , i = i % n + 1){
        pos[i] = j;
        if(gondolaSeq[j] != i){
            gondolaSeq[j] = i;
            avai.push_back(i);
        }
    }
    int res = 1;
    for(int j = n + 1 ; now < a.size() ; ++j){
        if(a[now].first == j){
//            printf("%d\n", gondolaSeq[a[now].second]);
            replacementSeq[l++] = gondolaSeq[a[now].second];
            avai.erase(find(avai.begin(),avai.end(),gondolaSeq[a[now].second]));
//            cerr << gondolaSeq[a[now].second] << endl;
            ++now;
        }else{
            replacementSeq[l++] = avai.back();
            gondolaSeq[pos[avai.back()]] = j;
            pos[j] = pos[avai.back()];
            avai.back() = j;
            res = (ll)res * avai.size() % mod;
        }
    }
    for(int i = 1 ; i <= n ; ++i)res = res * i % mod;
    return l;
}

//----------------------

int countReplacement(int n, int gondolaSeq[])
{
    if(valid(n,gondolaSeq) == 0)return 0;
    vector<ii> a;
    for(int i = 0 ; i < n ; ++i){
        if(gondolaSeq[i] > n)a.push_back(mp(gondolaSeq[i],i));
    }
    sort(a.begin(),a.end());
    int now = 0;
    int l = 0;
    vector<int> avai , pos(maxl);
    int root = -1;
    for(int i = 0 ; i < n ; ++i){
        if(gondolaSeq[i] <= n){
            root = i;
            break;
        }
    }
//    printf("%d",root);
    for(int i = (root == -1 ? 1 : gondolaSeq[root]) , j = (root == -1 ? 0 : root) , cnt = n ; cnt-- ; j = (j + 1) % n , i = i % n + 1){
        pos[i] = j;
        if(gondolaSeq[j] != i){
            gondolaSeq[j] = i;
            avai.push_back(i);
        }
    }
    int res = 1;
    for(int j = n + 1 ; now < a.size() ; ++j){
        if(a[now].first == j){
//            printf("%d\n", gondolaSeq[a[now].second]);
//            replacementSeq[l++] = gondolaSeq[a[now].second];
            avai.erase(find(avai.begin(),avai.end(),gondolaSeq[a[now].second]));
//            cerr << gondolaSeq[a[now].second] << endl;
            ++now;
        }else{
//            replacementSeq[l++] = avai.back();
            gondolaSeq[pos[avai.back()]] = j;
            pos[j] = pos[avai.back()];
            avai.back() = j;
            res = (ll)res * avai.size() % mod;
        }
    }
    if(root == -1)for(int i = 1 ; i <= n ; ++i)res = res * i % mod;
    return res;
}

Compilation message

gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:62:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j = n + 1 ; now < a.size() ; ++j){
                         ~~~~^~~~~~~~~~
gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:110:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j = n + 1 ; now < a.size() ; ++j){
                         ~~~~^~~~~~~~~~
gondola.cpp:92:9: warning: unused variable 'l' [-Wunused-variable]
     int l = 0;
         ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1280 KB Output is correct
2 Correct 2 ms 1280 KB Output is correct
3 Correct 3 ms 1280 KB Output is correct
4 Correct 3 ms 1280 KB Output is correct
5 Correct 2 ms 1280 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1280 KB Output is correct
2 Correct 2 ms 1280 KB Output is correct
3 Correct 1 ms 1280 KB Output is correct
4 Correct 3 ms 1280 KB Output is correct
5 Correct 3 ms 1280 KB Output is correct
6 Correct 7 ms 1536 KB Output is correct
7 Correct 13 ms 1664 KB Output is correct
8 Correct 11 ms 1664 KB Output is correct
9 Correct 5 ms 1408 KB Output is correct
10 Correct 11 ms 1664 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1280 KB Output is correct
2 Correct 3 ms 1408 KB Output is correct
3 Correct 3 ms 1280 KB Output is correct
4 Correct 3 ms 1280 KB Output is correct
5 Correct 2 ms 1280 KB Output is correct
6 Correct 7 ms 1408 KB Output is correct
7 Correct 13 ms 1664 KB Output is correct
8 Correct 10 ms 1536 KB Output is correct
9 Correct 5 ms 1408 KB Output is correct
10 Correct 12 ms 1664 KB Output is correct
11 Correct 3 ms 1280 KB Output is correct
12 Correct 2 ms 1280 KB Output is correct
13 Correct 7 ms 1536 KB Output is correct
14 Incorrect 3 ms 1280 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1324 KB Output is correct
2 Correct 3 ms 1324 KB Output is correct
3 Correct 3 ms 1324 KB Output is correct
4 Correct 3 ms 1324 KB Output is correct
5 Correct 3 ms 1324 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1324 KB Output is correct
2 Correct 3 ms 1324 KB Output is correct
3 Correct 3 ms 1324 KB Output is correct
4 Correct 3 ms 1324 KB Output is correct
5 Correct 3 ms 1324 KB Output is correct
6 Correct 3 ms 1324 KB Output is correct
7 Correct 3 ms 1324 KB Output is correct
8 Correct 3 ms 1324 KB Output is correct
9 Correct 4 ms 1324 KB Output is correct
10 Correct 3 ms 1324 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1324 KB Output is correct
2 Correct 4 ms 1324 KB Output is correct
3 Correct 3 ms 1324 KB Output is correct
4 Correct 3 ms 1324 KB Output is correct
5 Correct 3 ms 1324 KB Output is correct
6 Correct 3 ms 1324 KB Output is correct
7 Correct 3 ms 1324 KB Output is correct
8 Correct 3 ms 1324 KB Output is correct
9 Correct 3 ms 1324 KB Output is correct
10 Correct 3 ms 1324 KB Output is correct
11 Correct 13 ms 1708 KB Output is correct
12 Correct 14 ms 1708 KB Output is correct
13 Correct 110 ms 2580 KB Output is correct
14 Correct 12 ms 1664 KB Output is correct
15 Correct 49 ms 3476 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1324 KB Output is correct
2 Correct 3 ms 1324 KB Output is correct
3 Correct 3 ms 1324 KB Output is correct

Subtask #8
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1324 KB Output is correct
2 Correct 3 ms 1324 KB Output is correct
3 Correct 3 ms 1324 KB Output is correct
4 Correct 3 ms 1324 KB Output is correct
5 Correct 0 ms 1324 KB Output is correct
6 Correct 3 ms 1324 KB Output is correct
7 Incorrect 3 ms 1324 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #9
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1324 KB Output is correct
2 Correct 4 ms 1324 KB Output is correct
3 Correct 3 ms 1324 KB Output is correct
4 Correct 3 ms 1324 KB Output is correct
5 Correct 3 ms 1324 KB Output is correct
6 Correct 3 ms 1324 KB Output is correct
7 Incorrect 3 ms 1324 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1324 KB Output is correct
2 Correct 3 ms 1324 KB Output is correct
3 Correct 3 ms 1324 KB Output is correct
4 Correct 3 ms 1324 KB Output is correct
5 Correct 6 ms 1324 KB Output is correct
6 Correct 3 ms 1408 KB Output is correct
7 Incorrect 3 ms 1324 KB Output isn't correct
8 Halted 0 ms 0 KB -