Submission #529229

#	Time	Username	Problem	Language	Result	Execution time	Memory
529229		Icebear16	Mutating DNA (IOI21_dna)	C++17	35 / 100	34 ms	4936 KiB

dna

#include "dna.h"
#include<vector>
int n,q;
std::string s;
std::string c;
std::vector<int> A;
std::vector<int> B;
//std::vector<int> C;
void init(std::string a, std::string b) {
	n=a.length();
	s=a,c=b;
	A.push_back(0),B.push_back(0);
	for(int i=0;i<n;i++){
		if(a[i]!=b[i]){
			A.push_back(1);
			if(s[i]=='A'){
				B.push_back(1);
			}else{
				B.push_back(0);
			}
		}else{
			A.push_back(0);
			B.push_back(0);
		}
	}
	for(int i=1;i<=n;i++){
		A[i]+=A[i-1];
		B[i]+=B[i-1];
	}
	while(q--){
    	int x,y;
		get_distance(x,y);
	}
}
int get_distance(int x, int y) {
//	int h1=0,h2=0,l1=0,l2=0,k1=0,k2=0;
//	for(int i=x;i<=y;i++){
//		if(s[i]=='A'){
//			h1++;
//		}else if(s[i]=='T'){
//			l1++;
//		}else if(s[i]=='C'){
//			k1++;
//		}
//		if(c[i]=='A'){
//			h2++;
//		}else if(c[i]=='T'){
//			l2++;
//		}else if(c[i]=='C'){
//			k2++;
//		}
//	}
	int j=A[y+1]-A[x],k=B[y+1]-B[x];
	if(j%2==0 && k*2==j){
		return k;
	}else{
		return -1;
	}
}
//7 3
//ATATATA
//TATTATT
//1 5
//0 2
//0 6
//-1
//0
//-1

• Subtask 1: 0 / 21
• Subtask 2: 22 / 22
• Subtask 3: 13 / 13
• Subtask 4: 0 / 28
• Subtask 5: 0 / 16