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Submission #572522

# Submission time Handle Problem Language Result Execution time Memory
572522 2022-06-04T15:43:54 Z MohamedFaresNebili Sorting (IOI15_sorting) C++14
74 / 100
 1000 ms 18280 KB 
#include <bits/stdc++.h>
#include "sorting.h"
 
        using namespace std;
 
        using ll = long long;
        using ii = pair<int, int>;
        using vi = vector<int>;
 
        #define pb push_back
        #define pp pop_back
        #define ff first
        #define ss second
        #define lb lower_bound
        #define all(x) (x).begin(), (x).end()
 
        bool can(int N, int S[], int M, int X[], int Y[]) {
            int s[N], x[M], y[M];
            int res[N], pos[N], ind[N];
            for(int l = 0; l < N; l++) s[l] = S[l];
            for(int l = 0; l < M; l++)
                x[l] = X[l], y[l] = Y[l];
            for(int l = 0; l < N; l++) {
                res[l] = l; pos[s[l]] = l;
            }
            for(int l = 0; l < M; l++) {
                int i = x[l], j = y[l];
                swap(res[i], res[j]);
            }
            for(int l = 0; l < N; l++)
                ind[res[l]] = l;
            map<int, bool> se;
            for(int l = 0; l < N; l++) {
                if(s[l] == ind[l]) continue;
                se[l] = 1;
            }
            for(int l = 0; l < M; l++) {
                int i = x[l], j = y[l];
                swap(s[i], s[j]);
                swap(pos[s[i]], pos[s[j]]);
                i = ind[i], j = ind[j];
                swap(res[i], res[j]);
                swap(ind[res[i]], ind[res[j]]);
 
                if(se.count(x[l])) se.erase(x[l]);
                if(se.count(y[l])) se.erase(y[l]);
                if(s[x[l]] != ind[x[l]]) se[x[l]] = 1;
                if(s[y[l]] != ind[y[l]]) se[y[l]] = 1;
 
                int u = 0, v = 0;
                if(se.size() != 0) {
                    auto it = se.begin();
                    u = it->first;
                    v = pos[ind[it->first]];
                }
 
                swap(s[u], s[v]);
                swap(pos[s[u]], pos[s[v]]);
 
                if(se.count(u)) se.erase(u);
                if(se.count(v)) se.erase(v);
 
                if(s[u] != ind[u]) se[u] = 1;
                if(s[v] != ind[v]) se[v] = 1;
            }
            for(int l = 0; l < N - 1; l++)
                if(s[l] > s[l + 1]) return 0;
            return 1;
        }
 
        int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
            int lo = 0, hi = M;
            while(lo <= hi) {
                int md = (lo + hi) / 2;
                if(can(N, S, md, X, Y)) {
                    M = md; hi = md - 1;
                }
                else lo = md + 1;
            }
            int res[N], pos[N], ind[N];
            for(int l = 0; l < N; l++) {
                res[l] = l; pos[S[l]] = l;
            }
            for(int l = 0; l < M; l++) {
                int i = X[l], j = Y[l];
                swap(res[i], res[j]);
            }
            for(int l = 0; l < N; l++)
                ind[res[l]] = l;
            map<int, bool> se;
            for(int l = 0; l < N; l++) {
                if(S[l] == ind[l]) continue;
                se[l] = 1;
            }
            for(int l = 0; l < M; l++) {
                int i = X[l], j = Y[l];
                swap(S[i], S[j]);
                swap(pos[S[i]], pos[S[j]]);
                i = ind[i], j = ind[j];
                swap(res[i], res[j]);
                swap(ind[res[i]], ind[res[j]]);
 
                if(se.count(X[l])) se.erase(X[l]);
                if(se.count(Y[l])) se.erase(Y[l]);
 
                if(S[X[l]] != ind[X[l]]) se[X[l]];
                if(S[Y[l]] != ind[Y[l]]) se[Y[l]];
 
                int u = 0, v = 0;
                if(se.size() != 0) {
                    auto it = se.begin();
                    u = it->first, v = pos[ind[it->first]];
                }
 
                swap(S[u], S[v]);
                swap(pos[S[u]], pos[S[v]]);
 
                P[l] = u, Q[l] = v;
 
                if(se.count(u)) se.erase(u);
                if(se.count(v)) se.erase(v);
 
                if(S[u] != ind[u]) se[u] = 1;
                if(S[v] != ind[v]) se[v] = 1;
            }
            return M;
        }

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 212 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 8 ms 500 KB Output is correct
22 Correct 7 ms 468 KB Output is correct
23 Correct 7 ms 468 KB Output is correct
24 Correct 6 ms 468 KB Output is correct
25 Correct 2 ms 468 KB Output is correct
26 Correct 5 ms 468 KB Output is correct
27 Correct 5 ms 468 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 480 KB Output is correct
2 Correct 17 ms 468 KB Output is correct
3 Correct 23 ms 484 KB Output is correct
4 Correct 5 ms 468 KB Output is correct
5 Correct 6 ms 468 KB Output is correct
6 Correct 8 ms 468 KB Output is correct
7 Correct 13 ms 504 KB Output is correct
8 Correct 22 ms 488 KB Output is correct
9 Correct 20 ms 484 KB Output is correct
10 Correct 23 ms 488 KB Output is correct
11 Correct 19 ms 492 KB Output is correct
12 Correct 14 ms 468 KB Output is correct
13 Correct 23 ms 468 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 480 KB Output is correct
2 Correct 17 ms 468 KB Output is correct
3 Correct 23 ms 484 KB Output is correct
4 Correct 5 ms 468 KB Output is correct
5 Correct 6 ms 468 KB Output is correct
6 Correct 8 ms 468 KB Output is correct
7 Correct 13 ms 504 KB Output is correct
8 Correct 22 ms 488 KB Output is correct
9 Correct 20 ms 484 KB Output is correct
10 Correct 23 ms 488 KB Output is correct
11 Correct 19 ms 492 KB Output is correct
12 Correct 14 ms 468 KB Output is correct
13 Correct 23 ms 468 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Execution timed out 1094 ms 18280 KB Time limit exceeded
16 Halted 0 ms 0 KB -