Submission #37465

#	Time	Username	Problem	Language	Result	Execution time	Memory
37465		Kerim	Simple game (IZhO17_game)	C++14	100 / 100	326 ms	21548 KiB

game

#include "bits/stdc++.h"
#define MAXN 1000009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
int s[MAXN<<2],arr[MAXN];
void inc(int l,int r,int val,int nd,int x,int y){
	if(l>r or l>y or x>r)
		return;
	if(l<=x and y<=r){
		s[nd]+=val;
		return;
	}	
	int mid=(x+y)>>1;
	inc(l,r,val,nd<<1,x,mid);
	inc(l,r,val,nd<<1|1,mid+1,y);
}
int tap(int p,int nd,int x,int y){
	if(x==y)
		return s[nd];
	int mid=(x+y)>>1;
	if(p<=mid)
		return s[nd]+tap(p,nd<<1,x,mid);
	return s[nd]+tap(p,nd<<1|1,mid+1,y);
}
int main(){
    //~ freopen("file.in", "r", stdin);
    int n,q;
    scanf("%d%d",&n,&q);
    for(int i=1;i<=n;i++)
		scanf("%d",arr+i);
	for(int i=1;i<n;i++)
		inc(min(arr[i],arr[i+1]),max(arr[i],arr[i+1]),+1,1,1,1000000);
	while(q--){
		int t;
		scanf("%d",&t);
		if(t==1){
			int p,v;
			scanf("%d%d",&p,&v);
			if(p>1)
				inc(min(arr[p],arr[p-1]),max(arr[p],arr[p-1]),-1,1,1,1000000);
			if(p<n)
				inc(min(arr[p],arr[p+1]),max(arr[p],arr[p+1]),-1,1,1,1000000);
			arr[p]=v;	
			if(p>1)
				inc(min(arr[p],arr[p-1]),max(arr[p],arr[p-1]),+1,1,1,1000000);
			if(p<n)
				inc(min(arr[p],arr[p+1]),max(arr[p],arr[p+1]),+1,1,1,1000000);
		}
		else{
			int p;
			scanf("%d",&p);
			printf("%d\n",tap(p,1,1,1000000));
		}
	}
	return 0;
}

Compilation message (stderr)

game.cpp: In function 'int main()':
game.cpp:43:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&q);
                        ^
game.cpp:45:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",arr+i);
                    ^
game.cpp:50:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&t);
                 ^
game.cpp:53:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%d",&p,&v);
                       ^
game.cpp:66:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&p);
                  ^

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