Submission #552100

#	Time	Username	Problem	Language	Result	Execution time	Memory
552100		errorgorn	Misspelling (JOI22_misspelling)	C++17	100 / 100	1014 ms	163500 KiB

misspelling

// Super Idol的笑容
//    都没你的甜
//  八月正午的阳光
//    都没你耀眼
//  热爱105°C的你
// 滴滴清纯的蒸馏水

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;

#define int long long
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << ": " << x << endl

#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define lb lower_bound
#define ub upper_bound

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

const int MOD=1000000007;

int fix(int i){
	return (i%MOD+MOD)%MOD;
}

int n,m;
int tot[26];
int memo[500005][26];

int up[500005];
int down[500005];

set<int> gup;
set<int> gdown;

signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>n>>m;
	
	rep(x,1,n+1) up[x]=down[x]=x;
	
	int a,b;
	rep(x,0,m){
		cin>>a>>b;
		
		if (a<b) up[a]=max(up[a],b);
		else down[b]=max(down[b],a);
	}
	
	rep(x,1,n+2) gup.insert(x);
	rep(x,1,n+2) gdown.insert(x);
	
	rep(y,0,26) tot[y]=1;
	
	rep(x,n+1,1){
		while (*gup.lb(x+1)<=up[x]){
			int temp=*gup.lb(x+1);
			gup.erase(temp);
			
			int curr=0;
			rep(y,0,26){
				tot[y]=fix(tot[y]-curr);
				curr=fix(curr+memo[temp][y]);
			}
		}
		while (*gdown.lb(x+1)<=down[x]){
			int temp=*gdown.lb(x+1);
			gdown.erase(temp);
			
			int curr=0;
			rep(y,26,0){
				tot[y]=fix(tot[y]-curr);
				curr=fix(curr+memo[temp][y]);
			}
		}
		
		rep(y,0,26) memo[x][y]=tot[y];
		
		int curr=0;
		rep(y,0,26) curr=fix(curr+memo[x][y]);
		rep(y,0,26) tot[y]=fix(tot[y]+curr-memo[x][y]);
	}
	
	int ans=0;
	rep(y,0,26) ans=fix(ans+memo[1][y]);
	
	cout<<ans<<endl;
}

• Subtask 1: 8 / 8
• Subtask 2: 20 / 20
• Subtask 3: 29 / 29
• Subtask 4: 32 / 32
• Subtask 5: 11 / 11