Submission #252296

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
252296	2020-07-25T07:28:52 Z	Hehehe	Sorting (IOI15_sorting)	C++14	100 / 100	414 ms	30496 KB

sorting

#include<bits/stdc++.h> //:3
using namespace std;
typedef long long ll;
#define all(a) (a).begin(), (a).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define rc(s) return cout<<s,0
#define pi pair <int, int>
#define sz(x) (int)((x).size())
#include "sorting.h"

const int dx[] = {0, 1, 0, -1};
const int dy[] = {1, 0, -1, 0};

const ll H = 1e6 + 11;

//ifstream in(".in");
//ofstream out(".out");

int pos[H], n, m;
pi query[H], ans[H], a[H];
/*
bool check(int t, int S[]){

    int in[n + 11], out[n + 11];

    for(int i = 0; i < n; i++){
        in[i] = out[i] = S[i];
    }

    for(int i = 0; i < t; i++){
        swap(out[query[i].ff], out[query[i].ss]);
    }

    bool viz[n + 11];
    memset(viz, 0, sizeof(viz));

    int k = 0;
    for(int i = 0; i < n; i++){

        if(viz[i])continue;

        vector<int>cur;

        int v = out[i];
        while(v != i){
            cur.push_back(v);
            v = out[v];
        }
        cur.push_back(v);

        for(int j = sz(cur) - 1; j > 0; j--){
            a[k++] = {cur[0], cur[j]};
        }

        for(auto it : cur)viz[it] = 1;
    }

    if(k > t)return 0;

    for (int i = 0; i < n; ++i){
        pos[in[i]] = i;
    }

    for(int i = 0; i < k; i++){

        //His move
        int x = query[i].ff, y = query[i].ss;
        swap(in[x], in[y]);
        pos[in[x]] = x;
        pos[in[y]] = y;

        //My move
        x = pos[a[i].ff], y = pos[a[i].ss];
        swap(in[x], in[y]);
        pos[in[x]] = x;
        pos[in[y]] = y;

        ans[i] = {x, y};
    }

    while(k < t)ans[k++] = {0, 0};

    return 1;

} */
bool check(int t, int S[]){

    int out[n], in[n];

    for (int i = 0; i < n; ++i)
        out[i] = in[i] = S[i];

    for (int id = 0; id < t; ++id) {
        int i = query[id].ff, j = query[id].ss;
        swap(out[i], out[j]);
    }

    bool us[n];
    memset(us, false, sizeof us);

    int cnt = 0;

    for (int i = 0; i < n; ++i) {
        if (us[i])
            continue;

        vector<int> ord;
        int v = out[i];
        while (v != i) {
            ord.pb(v);
            us[v] = true;
            v = out[v];
        }
        ord.pb(v);
        us[v] = true;

        for (int j = sz(ord) - 1; j > 0; --j)
            a[cnt++] = mp(ord[0], ord[j]);
    }

    if (cnt > t)return 0;

    for (int i = 0; i < n; ++i)
        pos[in[i]] = i;

    for (int id = 0; id < cnt; ++id) {

        int i = query[id].ff, j = query[id].ss;
        swap(in[i], in[j]);
        pos[in[i]] = i;
        pos[in[j]] = j;


        i = pos[a[id].ff]; j = pos[a[id].ss];
        ans[id] = mp(i, j);
        swap(in[i], in[j]);
        pos[in[i]] = i;
        pos[in[j]] = j;
    }

    while (cnt < t)
        ans[cnt++] = mp(0, 0);

    return true;
}

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {

    n = N; m = M;

    for(int i = 0; i < m; i++){
        query[i].ff = X[i];
        query[i].ss = Y[i];
    }
    
    int l = -1, r = M;
    while (r - l > 1) {
        int m = (l + r) >> 1;
        if (check(m, S)) {
            r = m;
        } else {
            l = m;
        }
    }
    check(r, S);


    for(int i = 0; i < r; i++){
        P[i] = ans[i].ff;
        Q[i] = ans[i].ss;
    }

    return r;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:161:13: warning: declaration of 'm' shadows a global declaration [-Wshadow]
         int m = (l + r) >> 1;
             ^
sorting.cpp:22:16: note: shadowed declaration is here
 int pos[H], n, m;
                ^

Subtask #1
8.0 / 8.0

#	Verdict	Memory	Grader output
1	Correct	384 KB	Output is correct
2	Correct	384 KB	Output is correct
3	Correct	384 KB	Output is correct
4	Correct	384 KB	Output is correct
5	Correct	384 KB	Output is correct
6	Correct	384 KB	Output is correct
7	Correct	384 KB	Output is correct

Subtask #2
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	0 ms	384 KB	Output is correct
4	Correct	0 ms	384 KB	Output is correct
5	Correct	0 ms	384 KB	Output is correct
6	Correct	0 ms	384 KB	Output is correct
7	Correct	0 ms	384 KB	Output is correct
8	Correct	0 ms	384 KB	Output is correct
9	Correct	0 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	0 ms	384 KB	Output is correct

Subtask #3
16.0 / 16.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	1 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	0 ms	384 KB	Output is correct

Subtask #4
18.0 / 18.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	384 KB	Output is correct
2	Correct	0 ms	384 KB	Output is correct
3	Correct	0 ms	384 KB	Output is correct
4	Correct	0 ms	384 KB	Output is correct
5	Correct	0 ms	384 KB	Output is correct
6	Correct	0 ms	384 KB	Output is correct
7	Correct	0 ms	384 KB	Output is correct
8	Correct	0 ms	384 KB	Output is correct
9	Correct	0 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	0 ms	384 KB	Output is correct
13	Correct	0 ms	384 KB	Output is correct
14	Correct	0 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	384 KB	Output is correct
17	Correct	1 ms	384 KB	Output is correct
18	Correct	0 ms	384 KB	Output is correct
19	Correct	0 ms	384 KB	Output is correct
20	Correct	0 ms	384 KB	Output is correct
21	Correct	2 ms	768 KB	Output is correct
22	Correct	2 ms	768 KB	Output is correct
23	Correct	1 ms	768 KB	Output is correct
24	Correct	2 ms	768 KB	Output is correct
25	Correct	2 ms	768 KB	Output is correct
26	Correct	2 ms	768 KB	Output is correct
27	Correct	2 ms	768 KB	Output is correct

Subtask #5
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	512 KB	Output is correct
2	Correct	2 ms	640 KB	Output is correct
3	Correct	2 ms	640 KB	Output is correct
4	Correct	2 ms	640 KB	Output is correct
5	Correct	2 ms	640 KB	Output is correct
6	Correct	2 ms	640 KB	Output is correct
7	Correct	2 ms	640 KB	Output is correct
8	Correct	2 ms	640 KB	Output is correct
9	Correct	2 ms	640 KB	Output is correct
10	Correct	2 ms	640 KB	Output is correct
11	Correct	2 ms	640 KB	Output is correct
12	Correct	2 ms	640 KB	Output is correct
13	Correct	2 ms	640 KB	Output is correct
14	Correct	2 ms	512 KB	Output is correct

Subtask #6
26.0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	512 KB	Output is correct
2	Correct	2 ms	640 KB	Output is correct
3	Correct	2 ms	640 KB	Output is correct
4	Correct	2 ms	640 KB	Output is correct
5	Correct	2 ms	640 KB	Output is correct
6	Correct	2 ms	640 KB	Output is correct
7	Correct	2 ms	640 KB	Output is correct
8	Correct	2 ms	640 KB	Output is correct
9	Correct	2 ms	640 KB	Output is correct
10	Correct	2 ms	640 KB	Output is correct
11	Correct	2 ms	640 KB	Output is correct
12	Correct	2 ms	640 KB	Output is correct
13	Correct	2 ms	640 KB	Output is correct
14	Correct	2 ms	512 KB	Output is correct
15	Correct	260 ms	27200 KB	Output is correct
16	Correct	322 ms	27352 KB	Output is correct
17	Correct	318 ms	29536 KB	Output is correct
18	Correct	224 ms	24408 KB	Output is correct
19	Correct	331 ms	27876 KB	Output is correct
20	Correct	343 ms	28348 KB	Output is correct
21	Correct	324 ms	28400 KB	Output is correct
22	Correct	277 ms	24444 KB	Output is correct
23	Correct	303 ms	30496 KB	Output is correct
24	Correct	351 ms	30068 KB	Output is correct
25	Correct	363 ms	29720 KB	Output is correct
26	Correct	345 ms	27404 KB	Output is correct
27	Correct	305 ms	26324 KB	Output is correct
28	Correct	347 ms	29080 KB	Output is correct
29	Correct	412 ms	28180 KB	Output is correct
30	Correct	283 ms	25464 KB	Output is correct
31	Correct	383 ms	28792 KB	Output is correct
32	Correct	319 ms	29000 KB	Output is correct
33	Correct	350 ms	30200 KB	Output is correct
34	Correct	305 ms	29048 KB	Output is correct
35	Correct	335 ms	26880 KB	Output is correct
36	Correct	212 ms	23928 KB	Output is correct
37	Correct	350 ms	30128 KB	Output is correct
38	Correct	414 ms	28792 KB	Output is correct
39	Correct	358 ms	29096 KB	Output is correct

Submission #252296

Compilation message

Subtask #1 8.0 / 8.0

Subtask #2 12.0 / 12.0

Subtask #3 16.0 / 16.0

Subtask #4 18.0 / 18.0

Subtask #5 20.0 / 20.0

Subtask #6 26.0 / 26.0

Subtask #1
8.0 / 8.0

Subtask #2
12.0 / 12.0

Subtask #3
16.0 / 16.0

Subtask #4
18.0 / 18.0

Subtask #5
20.0 / 20.0

Subtask #6
26.0 / 26.0