Submission #1126153

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126153		HasanV11010238	DEL13 (info1cup18_del13)	C++20	0 / 100	12 ms	840 KiB

del13

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
int main(){
    ll t;
    cin>>t;
    while (t--){
        int n, k;
        cin>>n>>k;
        vector<int> v(k + 2, 0);
        for (int i = 1; i <= k; i++){
            cin>>v[i];
        }
        v[k + 1] = n + 1;
        vector<int> ord;
        for (int i = 0; i <= k; i++){
            ord.push_back(v[i + 1] - v[i] - 1);
            if (ord[i] != 0){
                if (ord[i] % 2 == 0){
                    ord[i] = 2;
                }
                else{
                    ord[i] = 1;
                }
            }
        }
        bool can = 1;
        for (int i = 0; i <= k; i++){
            if (i == k && ord[i] != 0){
                can = 0;
                break;
            }
            else if (i == k){
                continue;
            }
            if (i != k && ord[i] < 0){
                can = 0;
            }
            else{
                ord[i + 1] -= ord[i];
            }
        }
        if (can){
            cout<<0<<"\n";
            cout<<"\n";
        }
        else{
            cout<<-1<<"\n";
        }
    }
}

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