제출 #38621

#제출 시각아이디문제언어결과실행 시간메모리
38621MrPlanySimple game (IZhO17_game)C++14
22 / 100
133 ms6312 KiB
#include <bits/stdc++.h> using namespace std; const int N = 1000000; int t[N+9],a[100100]; int n; void add(int k, int val){ while(k<=N){ t[k]+=val; k+=k&-k; } } void gosh(int a, int b, int val){ if(a>b) swap(a,b); add(a,val); add(b+1,-val); } int sum(int pos){ int s = 0; while(pos>0){ s+=t[pos]; pos-=pos&-pos; } return s; } int main(){ cin>>n; int q; cin>>q; for(int i=1;i<=n;i++) cin>>a[i]; for(int i=1;i<n;i++) gosh(a[i],a[i+1],1); while(q--){ int type; cin>>type; if(type==1){ int pos, val; cin>>pos>>val; if(pos>1) gosh(a[pos-1],a[pos],-1); if(pos<n) gosh(a[pos],a[pos+1],-1); a[pos] = val; if(pos>1) gosh(a[pos-1],a[pos],1); if(pos<n) gosh(a[pos],a[pos+1],1); } else{ int pos; cin>>pos; cout << sum(pos) << endl; } } }
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