제출 #534285

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
534285		terrasphere	케이크 (CEOI14_cake)	C++17	0 / 100	354 ms	11708 KiB

cake

#include <bits/stdc++.h>

using namespace std;

long long n,p;
const long long P=1e9;
int q2=1e6,q3=1e6;
long long arr[252525];

vector<long long> tree;

void init(int start,int end,int node)
{
    if(start==end)
    {
        tree[node]=arr[start];
        return;
    }
    init(start,(start+end)/2,node*2);
    init((start+end)/2+1,end,node*2+1);
    tree[node]=max(tree[node*2],tree[node*2+1]);
    return;
}

void update(int start,int end,int node,int index)
{
    if(start<=index && index<=end)
    {
        tree[node]=max(tree[node],arr[index]);
        if(start==end)
        {
            tree[node]=arr[index];
            return;
        }
        update(start,(start+end)/2,node*2,index);
        update((start+end)/2+1,end,node*2+1,index);
    }
    return;
}

long long query1(int start,int end,int left,int right,int node)
{
    if(start>right || end<left)
        return 0;
    if(left<=start && end<=right)
        return tree[node];
    return max(query1(start,(start+end)/2,left,right,node*2),query1((start+end)/2+1,end,left,right,node*2+1));
}

void query2(int start,int end,int left,int right,int node,long long up)
{
    if(q2!=1e6)
        return;
    if(left>end || start>right)
        return;
    if(left<=start && end<=right)
    {
        if(tree[node]>up)
        {
            if(start==end)
            {
                q2=start;
                return;
            }
            query2(start,(start+end)/2,left,right,node*2,up);
            query2((start+end)/2+1,end,left,right,node*2+1,up);
        }
        return;
    }
    query2(start,(start+end)/2,left,right,node*2,up);
    query2((start+end)/2+1,end,left,right,node*2+1,up);
    return;
}

void query3(int start,int end,int left,int right,int node,long long up)
{
    if(q3!=1e6)
        return;
    if(left>end || start>right)
        return;
    if(left<=start && end<=right)
    {
        if(tree[node]>up)
        {
            if(start==end)
            {
                q3=start;
                return;
            }
            query3((start+end)/2+1,end,left,right,node*2+1,up);
            query3(start,(start+end)/2,left,right,node*2,up);
        }
        return;
    }
    query3((start+end)/2+1,end,left,right,node*2+1,up);
    query3(start,(start+end)/2,left,right,node*2,up);
    return;
}

int main()
{
    int m;
    scanf("%lld%lld",&n,&p);
    tree.resize(4*n);
    for(int i=0;i<n;i++)
    {
        scanf("%lld",&arr[i]);
        arr[i]*=P;
    }
    init(0,n-1,1);
    scanf("%d",&m);
    for(long long i=1;i<=m;i++)
    {
        q2=1e6;
        q3=1e6;
        char x;
        long long a,b;
        scanf(" %c",&x);
        if(x=='F')
        {
            scanf("%lld",&a);
            long long q;
            int ans=0;
            if(a>p)
            {
                //q3+1~a
                q=query1(0,n-1,p,a-1,1);
                query3(0,n-1,0,p-2,1,q);
                if(q3==1e6)
                    ans=a-1;
                else
                    ans=a-(q3+1)-1;
            }
            else if(a<p)
            {
                //a~q2-1
                q=query1(0,n-1,a-1,p-2,1);
                query2(0,n-1,p,n-1,1,q);
                if(q2==1e6)
                    ans=n-a;
                else
                    ans=q2-1-a+1;
            }
            printf("%d\n",ans);
        }
        else
        {
            scanf("%lld%lld",&a,&b);
            arr[a-1]=(n-b+1)*P+i;
            update(0,n-1,1,a-1);
        }
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

cake.cpp: In function 'int main()':
cake.cpp:103:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  103 |     scanf("%lld%lld",&n,&p);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
cake.cpp:107:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  107 |         scanf("%lld",&arr[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~
cake.cpp:111:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  111 |     scanf("%d",&m);
      |     ~~~~~^~~~~~~~~
cake.cpp:118:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  118 |         scanf(" %c",&x);
      |         ~~~~~^~~~~~~~~~
cake.cpp:121:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  121 |             scanf("%lld",&a);
      |             ~~~~~^~~~~~~~~~~
cake.cpp:148:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  148 |             scanf("%lld%lld",&a,&b);
      |             ~~~~~^~~~~~~~~~~~~~~~~~

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• Subtask 3: 0 / 20
• Subtask 4: 0 / 50