Submission #678281

#	Time	Username	Problem	Language	Result	Execution time	Memory
678281		12332100	Mutating DNA (IOI21_dna)	C++17	100 / 100	55 ms	14016 KiB

dna

    #include "dna.h"
    #include<bits/stdc++.h>
    using namespace std;
    typedef long long ll;
    string s,ss;
    ll dna[2][3][100001],jem[100001],res[100001][6];
    map<char,ll>mp;
    void init(string s,string ss) {
    	mp['A']=0;
    	mp['T']=1;
    	mp['C']=2;
    	dna[0][mp[s[0]]][0]=1;
    	dna[1][mp[ss[0]]][0]=1;
    	if(s[0]==ss[0])jem[0]=1;
    	for(int i=1;i<s.size();i++){
    		if(s[i]==ss[i])jem[i]=jem[i-1]+1;
    		else jem[i]=jem[i-1];
    		for(int j=0;j<3;j++){
    			dna[0][j][i]=dna[0][j][i-1];
    			dna[1][j][i]=dna[1][j][i-1];
    		}
    		dna[0][mp[s[i]]][i]++;
    		dna[1][mp[ss[i]]][i]++;
    	}
    	for(int i=0;i<s.size();i++){
    		if(i)for(int j=0;j<6;j++)res[i][j]=res[i-1][j];
    		if(s[i]=='A'){
    			if(ss[i]=='T'){
    				res[i][0]++;
    			}
    			else if(ss[i]=='C'){
    				res[i][2]++;
    			}
    		}else if(s[i]=='T'){
    			if(ss[i]=='A'){
    				res[i][1]++;
    			}else if(ss[i]=='C'){
    				res[i][5]++;
    			}
    		}else if(s[i]=='C'){
    			if(ss[i]=='A'){
    				res[i][3]++;
    			}else if(ss[i]=='T'){
    				res[i][4]++;
    			}
    		}
    	}
    }
    int get_distance(int x,int y) {
    	ll cnt=jem[y]-(x-1<0?0:jem[x-1]);
    	ll a1=dna[0][0][y]-(x-1<0?0:dna[0][0][x-1]);
    	ll t1=dna[0][1][y]-(x-1<0?0:dna[0][1][x-1]);
    	ll c1=dna[0][2][y]-(x-1<0?0:dna[0][2][x-1]);
    	ll a2=dna[1][0][y]-(x-1<0?0:dna[1][0][x-1]);
    	ll t2=dna[1][1][y]-(x-1<0?0:dna[1][1][x-1]);
    	ll c2=dna[1][2][y]-(x-1<0?0:dna[1][2][x-1]);
    	ll len=y-x+1;
    	if(a1!=a2 || t1!=t2 || c1!=c2)return -1;
    	ll at=min(res[y][0]-(x-1<0?0:res[x-1][0]),res[y][1]-(x-1<0?0:res[x-1][1]));
    	ll ac=min(res[y][2]-(x-1<0?0:res[x-1][2]),res[y][3]-(x-1<0?0:res[x-1][3]));
    	ll tc=min(res[y][4]-(x-1<0?0:res[x-1][4]),res[y][5]-(x-1<0?0:res[x-1][5]));
    	ll atc=len-(cnt+(at*2)+(ac*2)+(tc*2));
    	return (at+ac+tc+((2*atc)/3));
    }

Compilation message (stderr)

dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:15:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |      for(int i=1;i<s.size();i++){
      |                  ~^~~~~~~~~
dna.cpp:25:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |      for(int i=0;i<s.size();i++){
      |                  ~^~~~~~~~~

• Subtask 1: 21 / 21
• Subtask 2: 22 / 22
• Subtask 3: 13 / 13
• Subtask 4: 28 / 28
• Subtask 5: 16 / 16