Submission #1020951

#	Time	Username	Problem	Language	Result	Execution time	Memory
1020951		MrAndria	DEL13 (info1cup18_del13)	C++14	15 / 100	11 ms	1372 KiB

del13

#include <bits/stdc++.h>
using namespace std;
#define ff first;
#define ss second
#define pb push_back
//#define int long long
int t,n,q,b1,l;
int a[200005];
vector <int> v,v2;
int main(){
    cin>>t;
    while(t--){
        cin>>n>>q;
        for(int i=1;i<=q;i++){
            cin>>a[i];
        }
        v2.clear();
        v.clear();
        a[q+1]=n+1;
        b1=0;
        for(int i=1;i<=q+1;i++){
            if(a[i]-a[i-1]-1==0){
                v.pb(0);
            }else{
                if((a[i]-a[i-1]-1)%2==0){
                    v.pb(2);
                }else{
                    v.pb(1);
                }
            }
        }
        for(int i=1;i<v.size();i++){
            v[i]-=v[i-1];
            if(v[i]<0){
                b1=1;
            }
        }
        if(v.back()!=0 or b1){
            cout<<-1<<endl;
            continue;
        }
        for(int i=1;i<=q+1;i++){
            if(a[i]-a[i-1]-1==0){
            }else{
                if((a[i]-a[i-1]-1)%2==0){
                    for(int j=1;j<=(a[i]-a[i-1]-3)/2;j++){
                        v2.pb((a[i]+a[i-1])/2);
                    }
                }else{
                    for(int j=1;j<=(a[i]-a[i-1]-2)/2;j++){
                        // cout<<"YES"<<endl;
                        v2.pb((a[i]+a[i-1])/2);
                    }
                }
            }
        }
        for(int i=1;i<v.size();i++){
            for(int j=1;j<=v[i-1];j++){
                v2.pb(a[i]);
            }
        }
        if(v2.size()>(n-q)/2){
            assert(0);
        }
        cout<<v2.size()<<endl;
        for(int i=0;i<v2.size();i++){
            cout<<v2[i]<<" ";
        }
        cout<<endl;
        // b1=0;
        // v.clear();
        // l=1;
        // for(int i=1;i<=q;i++){
        //     for(int j=1;j<=a[i]-l;j++){
        //         v.pb(a[i]);
        //     }
        //     l=2*a[i]-l+1;
        //     if(i!=q){
        //         if(a[i+1]<l){
        //             b1=1;
        //             break;
        //         }
        //     }else{
        //         if(l!=n+1){
        //             b1=1;
        //             break;
        //         }
        //     }
        // }
        // if(b1){
        //     cout<<-1<<endl;
        // }else{
        //     cout<<v.size()<<endl;
        //     for(int i=0;i<v.size();i++){
        //         cout<<v[i]<<" ";
        //     }
        //     cout<<endl;
        // }
    }
}

Compilation message (stderr)

del13.cpp: In function 'int main()':
del13.cpp:32:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         for(int i=1;i<v.size();i++){
      |                     ~^~~~~~~~~
del13.cpp:57:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |         for(int i=1;i<v.size();i++){
      |                     ~^~~~~~~~~
del13.cpp:62:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   62 |         if(v2.size()>(n-q)/2){
      |            ~~~~~~~~~^~~~~~~~
del13.cpp:66:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |         for(int i=0;i<v2.size();i++){
      |                     ~^~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 15
• Subtask 3: 15 / 15
• Subtask 4: 0 / 25
• Subtask 5: 0 / 30