Submission #257847

#	Time	Username	Problem	Language	Result	Execution time	Memory
257847		shrek12357	Sorting (IOI15_sorting)	C++14	Compilation error	0 ms	0 KiB

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;
} 
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].first = x[i];
      query[i].second = y[i];
    }
  	int lo = -1;
	int hi = M;
	while (lo + 1 < hi) {
		int mid = (lo + hi) / 2;
		if (check(mid, S)) {
			hi = mid;
		}
		else {
			lo = mid;
		}
		toChange.clear();
	}
	check(hi, S, N, X, Y);
	getAns(hi, S, N, X, Y);
	for (int i = 0; i < xAns.size(); i++) {
		P[i] = xAns[i];
		Q[i] = yAns[i];
	}
	return hi;
}

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:92:24: error: 'x' was not declared in this scope
       query[i].first = x[i];
                        ^
sorting.cpp:93:25: error: 'y' was not declared in this scope
       query[i].second = y[i];
                         ^
sorting.cpp:105:3: error: 'toChange' was not declared in this scope
   toChange.clear();
   ^~~~~~~~
sorting.cpp:107:22: error: too many arguments to function 'bool check(int, int*)'
  check(hi, S, N, X, Y);
                      ^
sorting.cpp:25:6: note: declared here
 bool check(int t, int S[]){
      ^~~~~
sorting.cpp:108:2: error: 'getAns' was not declared in this scope
  getAns(hi, S, N, X, Y);
  ^~~~~~
sorting.cpp:108:2: note: suggested alternative: 'setns'
  getAns(hi, S, N, X, Y);
  ^~~~~~
  setns
sorting.cpp:109:22: error: 'xAns' was not declared in this scope
  for (int i = 0; i < xAns.size(); i++) {
                      ^~~~
sorting.cpp:109:22: note: suggested alternative: 'ans'
  for (int i = 0; i < xAns.size(); i++) {
                      ^~~~
                      ans
sorting.cpp:111:10: error: 'yAns' was not declared in this scope
   Q[i] = yAns[i];
          ^~~~
sorting.cpp:111:10: note: suggested alternative: 'ans'
   Q[i] = yAns[i];
          ^~~~
          ans