Submission #425048

#	Time	Username	Problem	Language	Result	Execution time	Memory
425048		zoooma13	The short shank; Redemption (BOI21_prison)	C++14	0 / 100	1 ms	292 KiB

prison

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n ,k ,T;
    scanf("%d%d%d",&n,&k,&T);
    assert(k == 1);
    vector <int> a(n);
    for(int&i : a)
        scanf("%d",&i);

    int ans = 0;
    vector <pair<int ,int>> rs;
    deque <pair<int ,int>> q;
    for(int i = 0; i < n; i++){
        while(!q.empty() && q.front().first >= T-i)
            q.pop_front();
        if(a[i] < T){
            while(!q.empty() && q.back().first >= a[i]-i)
                q.pop_back();
            q.push_back({a[i]-i ,i});
        }else if(!q.empty())
            rs.push_back({q.back().second ,i-1});
        else
            ans++;
    }

    vector <int> cum(n+1);
    for(auto&p : rs){
        cum[p.first]++;
        cum[p.second+1]--;
    }

    int mx = 0;
    for(int i = 0; i < n; i++){
        cum[i] += i? cum[i-1] : 0;
        mx = max(mx ,cum[i]);
    }

    printf("%d\n",n-ans-mx);
}

Compilation message (stderr)

prison.cpp: In function 'int main()':
prison.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     scanf("%d%d%d",&n,&k,&T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
prison.cpp:11:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         scanf("%d",&i);
      |         ~~~~~^~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 25
• Subtask 6: 0 / 20