Submission #1119842

#	Time	Username	Problem	Language	Result	Execution time	Memory
1119842		Aviansh	Lasers (NOI19_lasers)	C++17	0 / 100	238 ms	262144 KiB

lasers

#include <bits/stdc++.h>
 
using namespace std;
 
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int l,r;
    cin >> l >> r;
    vector<int>walls[r];
    int sums[r];
    for(int i = 0;i<r;i++){
        int x;
        cin >> x;
        sums[i]=0;
        for(int j = 0;j<x;j++){
            int c;
            cin >> c;
            sums[i]+=c;
            walls[i].push_back(c);
        }
    }
    bool val[l];
    fill(val,val+l,0);
    for(int i = 0;i<r;i++){
        int curl = 0;
        for(int w : walls[i]){
            int lef = sums[i]-curl;
            lef=l-lef;
            int right = curl+w-1;
          	if(right<lef)
              continue;
            for(int a = lef;a<=right;a++){
                val[a]=1;
            }
            curl+=w;
        }
    }
    int ans = 0;
    for(int i = 0;i<l;i++){
        ans+=val[i];
    }
    cout << ans;
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 22
• Subtask 6: 0 / 13