Submission #35661

#	Time	Username	Problem	Language	Result	Execution time	Memory
35661		dqhungdl	Simple game (IZhO17_game)	C++14	100 / 100	469 ms	33656 KiB

game

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

const int MAX=1e6;
int n,T,a[100005],tree[4000005],lazy[4000005];

void Down(int k)
{
    tree[2*k]+=lazy[k];
    lazy[2*k]+=lazy[k];
    tree[2*k+1]+=lazy[k];
    lazy[2*k+1]+=lazy[k];
    lazy[k]=0;
}

void Update(int k,int l,int r,int L,int R,int val)
{
    if(l>R||L>r)
        return;
    if(L<=l&&r<=R)
    {
        tree[k]+=val;
        lazy[k]+=val;
        return;
    }
    Down(k);
    int mid=(l+r)/2;
    Update(2*k,l,mid,L,R,val);
    Update(2*k+1,mid+1,r,L,R,val);
}

int Query(int k,int l,int r,int pos)
{
    if(l==r)
        return tree[k];
    Down(k);
    int mid=(l+r)/2;
    if(pos<=mid)
        return Query(2*k,l,mid,pos);
    return Query(2*k+1,mid+1,r,pos);
}

int main()
{
    //freopen("TEST.INP","r",stdin);
    scanf("%d%d",&n,&T);
    for(int i=1;i<=n;i++)
        scanf("%d",&a[i]);
    for(int i=2;i<=n;i++)
        Update(1,1,MAX,min(a[i-1],a[i]),max(a[i-1],a[i]),1);
    for(int i=2;i<n;i++)
        Update(1,1,MAX,a[i],a[i],-1);
    int type,pos,val;
    while(T--)
    {
        scanf("%d",&type);
        if(type==1)
        {
            scanf("%d%d",&pos,&val);
            if(pos>1)
                Update(1,1,MAX,min(a[pos-1],a[pos]),max(a[pos-1],a[pos]),-1);
            if(pos<n)
                Update(1,1,MAX,min(a[pos],a[pos+1]),max(a[pos],a[pos+1]),-1);
            if(1<pos&&pos<n)
                Update(1,1,MAX,a[pos],a[pos],1);
            a[pos]=val;
            if(pos>1)
                Update(1,1,MAX,min(a[pos-1],a[pos]),max(a[pos-1],a[pos]),1);
            if(pos<n)
                Update(1,1,MAX,min(a[pos],a[pos+1]),max(a[pos],a[pos+1]),1);
            if(1<pos&&pos<n)
                Update(1,1,MAX,a[pos],a[pos],-1);
        }
        else
        {
            scanf("%d",&val);
            printf("%d\n",Query(1,1,MAX,val));
        }
    }
}

Compilation message (stderr)

game.cpp: In function 'int main()':
game.cpp:46:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&T);
                        ^
game.cpp:48:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
                          ^
game.cpp:56:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&type);
                          ^
game.cpp:59:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d%d",&pos,&val);
                                    ^
game.cpp:76:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&val);
                             ^

• Subtask 1: 22 / 22
• Subtask 2: 27 / 27
• Subtask 3: 51 / 51