Submission #1042010

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042010		PM1	ZIGZAG (INOI20_zigzag)	C++17	8 / 100	2070 ms	3668 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define fr first
#define sc second
#define ll long long
const int mxn=3e5+5,szz=(1<<20);
ll n,q,a[mxn];

int main(){
	cin>>n>>q;
	for(int i=1;i<=n;i++){
		cin>>a[i];
	}
	while(q--){
		int l,r,z;
		char ty;
		cin>>ty;
		if(ty=='\\')
			cin>>ty;
		cin>>l>>r;
		if(ty=='+'){
			cin>>z;
			for(int i=l;i<=r;i++)
				a[i]+=z;
		}
		else if(ty=='?'){
			ll ans=0,last,cnt=0;
			for(int i=l;i<=r;i++){
				if(cnt==0){
					ans++;
					cnt++;
				}
				else if(a[i-1]==a[i]){
					cnt=1;
					ans++;
				}
				else if(cnt>1){
					if(a[i-2]<=a[i-1] && a[i-1]>a[i]){
						ans+=cnt+1;
						cnt++;
					}
					else if(a[i-2]>=a[i-1] && a[i-1]<a[i]){
						ans+=cnt+1;
						cnt++;
					}
					else{
						ans+=2;
						cnt=2;
					}
				}
				else{
					ans+=2;
					cnt++;
				}
			}
			cout<<ans<<'\n';

		}
		else{
			for(int i=l;i<=r;i++)
				a[i]*=-1;
		}
	}
	return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:27:13: warning: unused variable 'last' [-Wunused-variable]
   27 |    ll ans=0,last,cnt=0;
      |             ^~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 42
• Subtask 3: 0 / 35
• Subtask 4: 0 / 15