Submission #173851

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
173851	2020-01-05 14:26:32	arnold518	Safety (NOI18_safety)	C++14	100 / 100	76 ms	6252 KiB

safety

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int MAXN = 2e5;
int N, K, A[MAXN+10];
ll lx, rx, y;
priority_queue<ll, vector<ll>, less<ll>> l;
priority_queue<ll, vector<ll>, greater<ll>> r;
int main()
{
    int i, j;
    scanf("%d%d", &N, &K);
    for(i=1; i<=N; i++) scanf("%d", &A[i]);
    lx=rx=y=0;
    l.push(A[1]); r.push(A[1]);
    for(i=2; i<=N; i++)
    {
        lx-=K; rx+=K;
        if(l.top()+lx<=A[i] && A[i]<=r.top()+rx)
        {
            l.push(A[i]-lx); r.push(A[i]-rx);
        }
 
 
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Compilation message (stderr)

safety.cpp: In function 'int main()':
safety.cpp:17:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
safety.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &K);
     ~~~~~^~~~~~~~~~~~~~~~
safety.cpp:20:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(i=1; i<=N; i++) scanf("%d", &A[i]);
                         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 4 / 4
• Subtask 3: 9 / 9
• Subtask 4: 5 / 5
• Subtask 5: 6 / 6
• Subtask 6: 11 / 11
• Subtask 7: 11 / 11
• Subtask 8: 22 / 22
• Subtask 9: 29 / 29