Submission #998151

#TimeUsernameProblemLanguageResultExecution timeMemory
998151cpdreamerBliskost (COI23_bliskost)C++17
100 / 100
159 ms19352 KiB
#include <bits/stdc++.h> using namespace std; int char_diff(char a,char b){ int index_a=int(a)-int('a'); int index_b=int(b)-int('a'); int diff=(index_b-index_a+26)%26; return diff; } void solve() { int n,q; cin>>n>>q; string s; cin>>s; string t; cin>>t; int sign[n]; int value[n]; sign[n-1]=1; for(int i=n-2;i>=0;i--){ sign[i]=-1*sign[i+1]; } int c=0; for(int i=0;i<n;i++){ value[i]=char_diff(s[i],t[i]); c+=value[i]*sign[i]; } c=c%26; if(c==0) cout<<"da"<<'\n'; else cout<<"ne"<<'\n'; while(q--){ int pos; char ch; cin>>pos>>ch; pos--; s[pos]=ch; c-=value[pos]*sign[pos]; value[pos]=char_diff(s[pos],t[pos]); c+=value[pos]*sign[pos]; c=c%26; if(c==0) cout<<"da"<<'\n'; else cout<<"ne"<<'\n'; } } int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); //file(); solve(); return 0; }
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