Submission #901670

#	Time	Username	Problem	Language	Result	Execution time	Memory
901670		alexander707070	Misspelling (JOI22_misspelling)	C++14	28 / 100	4042 ms	8408 KiB

misspelling

#include<bits/stdc++.h>
#define MAXN 20007
using namespace std;
 
const int mod=1e9+7;
 
int n,m,a,b,ans;
 
int dp[MAXN][30];
int es[MAXN],es2[MAXN];
bool bad[MAXN],bad2[MAXN];
int pt,pt2;

int sum[30],sum2[30];
 
void calc_dp(){

    pt=pt2=n+1;

    for(int pos=n;pos>=1;pos--){

        for(int f=pos+1;f<=es[pos];f++){
            
            for(int letter=0;letter<26;letter++){
                if(!bad[f])sum[letter]-=dp[f][letter]; sum[letter]+=mod; sum[letter]%=mod;
            }
            bad[f]=true;
        }
        for(int f=pos+1;f<=es2[pos];f++){

            for(int letter=0;letter<26;letter++){
                if(!bad2[f])sum2[letter]-=dp[f][letter]; sum2[letter]+=mod; sum2[letter]%=mod;
            }
            bad2[f]=true;
        }

        if(es[pos]>=pos+1)pt=pos+1;
        if(es2[pos]>=pos+1)pt2=pos+1;

        for(int letter=0;letter<26;letter++){

            dp[pos][letter]=1;
            
            for(int nxtletter=0;nxtletter<26;nxtletter++){
                if(nxtletter==letter)continue;
                
                if(nxtletter<letter)dp[pos][letter]+=sum[nxtletter];
                if(nxtletter>letter)dp[pos][letter]+=sum2[nxtletter];
                dp[pos][letter]%=mod;

            }
        }

        for(int letter=0;letter<26;letter++){
            sum[letter]+=dp[pos][letter]; sum[letter]%=mod;
            sum2[letter]+=dp[pos][letter]; sum2[letter]%=mod;
        }
    }
}
 
 
int main(){
 
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
 
    cin>>n>>m;
    for(int i=1;i<=m;i++){
        cin>>a>>b;
 
        if(a<b){
            es[a]=max(es[a],b);
        }else{
            es2[b]=max(es2[b],a);
        }
    }

    calc_dp();
    for(int i=0;i<26;i++){
        ans+=dp[1][i];
        ans%=mod;
    }
 
    cout<<ans<<"\n";
 
    return 0;
}

Compilation message (stderr)

misspelling.cpp: In function 'void calc_dp()':
misspelling.cpp:25:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   25 |                 if(!bad[f])sum[letter]-=dp[f][letter]; sum[letter]+=mod; sum[letter]%=mod;
      |                 ^~
misspelling.cpp:25:56: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   25 |                 if(!bad[f])sum[letter]-=dp[f][letter]; sum[letter]+=mod; sum[letter]%=mod;
      |                                                        ^~~
misspelling.cpp:32:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   32 |                 if(!bad2[f])sum2[letter]-=dp[f][letter]; sum2[letter]+=mod; sum2[letter]%=mod;
      |                 ^~
misspelling.cpp:32:58: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   32 |                 if(!bad2[f])sum2[letter]-=dp[f][letter]; sum2[letter]+=mod; sum2[letter]%=mod;
      |                                                          ^~~~

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