Submission #858374

#	Time	Username	Problem	Language	Result	Execution time	Memory
858374		willychan	Misspelling (JOI22_misspelling)	C++14	0 / 100	1 ms	4444 KiB

misspelling

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
//#include<bits/extc++.h>
//__gnu_pbds

const int MOD = 1000000007;
const int N = 5e5+5;
ll dp[N][26][2][2];
bool start[N][2];
int inr[N][2];

int main(){
	ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int n,m;cin>>n>>m;	
	for(int i=0;i<m;i++){
		int a,b;cin>>a>>b;
		bool w=0;
		if(a>b) {w=1; swap(a,b);}
		start[a+1][w]=1;
		inr[a+1][w]++;
		inr[b+1][w]--;
	}
	for(int i=1;i<=n;i++){
		inr[i][0]+=inr[i-1][0];
		inr[i][1]+=inr[i-1][1];
	}
	for(int i=0;i<26;i++) dp[1][i][0][0]=1;
	for(int i=2;i<=n;i++){
		for(int c= 0;c<26;c++){
		//	cout<<(char)(c+'a')<<":";
			for(int f=0;f<2;f++){
			for(int s=0;s<2;s++){
				int l[2][2];
				int r[2][2];
				for(int ff=0;ff<2;ff++){
					for(int ss=0;ss<2;ss++){
						l[ff][ss]=0;
						r[ff][ss]=25;
					}
				}
				// stupid trans
				if(start[i][0]){
					if(f){
						l[0][0]=c;
						r[0][0]=c;
						l[1][0]=c;
						r[1][0]=c;
					}else{
						l[0][0] = 0;
						r[0][0] = c-1;
						l[1][0] = 0;
						r[1][0] = c-1;	
					}
				}else if(inr[i][0]){
					if(f){
						l[0][0] = -1;
						r[0][0] = -1;
						l[1][0] = c;
						r[1][0] = c;
					}else{
						l[0][0] = 0;
						r[0][0] = 25;
						l[0][0] = 0;
						r[1][0] = c-1;
					}
				}else{
					if(f){
						l[0][0] = -1;
						r[0][0] = -1;
						l[1][0] = -1;
						r[1][0] = -1;
					}else{
						l[0][0] = 0;
						r[0][0] = 25;
						l[1][0] = 0;
						r[1][0] = 25;
					}
				}
				
				if(start[i][1]){
					if(s){
						l[0][1]=c;
						r[0][1]=c;
						l[1][1]=c;
						r[1][1]=c;
					}else{
						l[0][1] = c+1;
						r[0][1] = 25;
						l[1][1] = c+1;
						r[1][1] = 25;	
					}
				}else if(inr[i][1]){
					if(s){
						l[0][1] = -1;
						r[0][1] = -1;
						l[1][1] = c;
						r[1][1] = c;
					}else{
						l[0][1] = 0;
						r[0][1] = 25;
						l[0][1] = c+1;
						r[1][1] = 25;
					}
				}else{
					if(s){
						l[0][1] = -1;
						r[0][1] = -1;
						l[1][1] = -1;
						r[1][0] = -1;
					}else{
						l[0][1] = 0;
						r[0][1] = 25;
						l[1][1] = 0;
						r[1][1] = 25;
					}
				}
			// stupid trans
			for(int ff=0;ff<2;ff++){
				for(int ss=0;ss<2;ss++){
					int tl = max(l[ff][0],l[ss][1]);
					int tr = min(r[ff][0],r[ss][1]);
					if(tl>tr || tl<0 || tr<0) continue;
					for(int cc=tl;cc<=tr;cc++){
						dp[i][c][f][s] = (dp[i][c][f][s]+dp[i-1][cc][ff][ss])%MOD;
					}
				}
			}
			//cout<<dp[i][c][f][s]<<",";
		}
		}
		//cout<<" ";
		}
		//cout<<"\n";
	}
	ll ans = 0;
	for(int c=0;c<26;c++){
		for(int f=0;f<2;f++){
			for(int s=0;s<2;s++){
				ans = (ans+dp[n][c][f][s])%MOD;
			}
		}
	}
	cout<<ans<<"\n";
	return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 20
• Subtask 3: 0 / 29
• Subtask 4: 0 / 32
• Subtask 5: 0 / 11