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Submission #600121

# Submission time Handle Problem Language Result Execution time Memory
600121 2022-07-20T13:20:55 Z PiejanVDC Sorting (IOI15_sorting) C++17
0 / 100
 1000 ms 356 KB 
#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;

int findSwapPairs(int n, int s[], int m, int X[], int Y[], int P[], int Q[]) {
    auto sorted = [&] () -> bool {
        for(int i = 0 ; i < n ; i++)
            if(s[i] != i)
                return 0;
        return 1;
    };
    for(int T = 1 ; T <= m ; T++) {
        vector<int>c(n);
        for(int i = 0 ; i < n ; i++) c[i]= i;
        for(int i = 0 ; i < T ; i++)
            swap(c[X[i]], c[Y[i]]);
        vector<int>go(n, -1);
        for(int i = 0 ; i < n ; i++) {
            //assert(go[c[i]] == -1);
            go[i] = c[i];
        }
        vector<int>v(n);
        auto S = [&] (int W) {
            for(int i = 0 ; i < n ; i++)
                if(v[i] == W)
                    return i;
            //assert(0);
        };
        for(int i = 0 ; i < n ; i++) v[i] = s[i];
        int cnt = 0;
        for(int i = 0 ; i < T ; i++) {
            if(sorted())
                return cnt;
            cnt++;
            swap(v[X[i]], v[Y[i]]);
            swap(go[X[i]], go[Y[i]]);
            int j;
            for(j = 0 ; j < n ; j++) {
                if(go[j] != v[j]) {
                    int p = S(go[j]);
                    P[cnt-1] = p;
                    Q[cnt-1] = i;
                    swap(v[p], v[j]);
                    break;
                }
            }
            if(j == n)
                P[cnt] = 0, Q[cnt] = 0;
            // do the swappings
            // look for first element not correct in go
        }
        if(sorted())
            return cnt;
    }
   return 0;
}

Compilation message

sorting.cpp: In lambda function:
sorting.cpp:28:9: warning: control reaches end of non-void function [-Wreturn-type]
   28 |         };
      |         ^

Subtask #1
0 / 8.0

# 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 Incorrect 1 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# 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 Incorrect 1 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Runtime error 1 ms 340 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 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 Incorrect 1 ms 212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1070 ms 356 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1070 ms 356 KB Time limit exceeded
2 Halted 0 ms 0 KB -