Submission #761976

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
761976	2023-06-20T13:24:20 Z	Ahmed57	Sorting (IOI15_sorting)	C++17	16 / 100	1 ms	340 KB

sorting

#include <bits/stdc++.h>
using namespace std;
int lol[100001],vis[100001];
vector<int> v;
void dfs(int i){
    vis[i] = 1;
    v.push_back(i);
    if(vis[lol[i]]==0)dfs(lol[i]);
}
//int P[100001] , Q[100001];
int findSwapPairs(int N,int S[],int M,int X[],int Y[],int P[],int Q[]){
    if(N==1)return 0;
    bool ss =1;
    if(X[0]==Y[0]){
        ss = 0;
    }
    int ans = 0;
    if(ss){
    swap(S[0],S[1]);
    int on = 0 , ze = 0;
    for(int i = 0;i<N;i++){
        if(S[i]==0)ze = i;
        if(S[i]==1)on = i;
    }
    if(ze>1){
        swap(S[(on?0:1)],S[ze]);
        P[0] = ze , Q[0] = (on?0:1);
        //cout<<ze<<"hh"<<endl;
        ans++;
        swap(S[0],S[1]);
        if(on>1){
            swap(S[0],S[on]);
            P[1] = 0 , Q[1] = on;
            ans++;
            swap(S[0],S[1]);
        }
    }else if(on>1){
        if(ze==0){
            swap(S[1],S[on]);
            P[0] = on;
            Q[0] = 1;
            ans++;
        }else{
            swap(S[0],S[on]);
            P[0] = on;
            Q[0] = 0;
            ans++;
        }
        swap(S[0],S[1]);
    }
    }
    for(int i = 0;i<N;i++){
        lol[i] = S[i];
        vis[i] = 0;
    }
    int ha = -1;
    for(int i = 2;i<N;i++){
        if(vis[i]==0){
            v.clear();
            dfs(i);
            for(int j = 1;j<v.size();j++){
                ha++;
                P[ans] = v[0];
                Q[ans] = v[j];
                ans++;
            }
        }
    }
    if(!ss){
        return ans;
    }
    if(ha==-1){
        if(S[0]==1){
            return ans;
        }else{
            P[ans] = 0;
            Q[ans] = 0;
            ans++;
            return ans;
        }
    }else{
        int pr = ha%2;
        if(S[pr]==0){
            return ans;
        }else{
            P[ans] = 0;
            Q[ans] = 0;
            ans++;
            return ans;
        }
    }

}
/*
int main(){
    int S[] = {0,4,1,3,2};
    0 4 1 3 2
    4 0 1 3 2 E
    1 0 4 3 2 A
    0 1 4 3 2
    int X[] = {0,0,0,0,0,0,0,0,0,0,0};
    int Y[] = {1,1,1,1,1,1,1,1,1,1,1};
    cout<<findSwapPairs(5,S,100,X,Y)<<endl;
    for(int i = 0;i<10;i++){
        cout<<P[i]<<" "<<Q[i]<<endl;
    }
}
*/

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:61:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |             for(int j = 1;j<v.size();j++){
      |                           ~^~~~~~~~~
sorting.cpp:11:37: warning: unused parameter 'M' [-Wunused-parameter]
   11 | int findSwapPairs(int N,int S[],int M,int X[],int Y[],int P[],int Q[]){
      |                                 ~~~~^

Subtask #1
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	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	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Incorrect	1 ms	212 KB	Output isn't correct
4	Halted	0 ms	0 KB	-

Subtask #3
16.0 / 16.0

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