Submission #866168

#	Time	Username	Problem	Language	Result	Execution time	Memory
866168		lomta	Mutating DNA (IOI21_dna)	C++17	Compilation error	0 ms	0 KiB

dna

#include <bits/stdc++.h>
using namespace std;



const int N = 1e5 + 5;
int pref1[N],pref2[N],pref3[N];





void init(string a, string b) {
	
	int n=a.size();
	
	pref1[0]=0;
	for(int i=0;i<n;i++){
		pref1[i+1]=pref1[i];
		if(a[i]=='A' && b[i]=='T'){
			pref1[i+1]++;
		}
		if(a[i]=='T' && b[i]=='A'){
			pref1[i+1]--;
		}
	}
	
	pref2[0]=0;
	for(int i=0;i<n;i++){
		pref2[i+1]=pref2[i];
		if(a[i]=='T' && b[i]=='C'){
			pref2[i+1]++;
		}
		if(a[i]=='C' && b[i]=='T'){
			pref2[i+1]--;
		}
	}
	pref3[0]=0;
	for(int i=0;i<n;i++){
		pref3[i+1]=pref3[i];
		if(a[i]=='C' && b[i]=='A'){
			pref3[i+1]++;
		}
		if(a[i]=='A' && b[i]=='C'){
			pref3[i+1]--;
		}
	}
}

int get_distance(int x, int y) {
	x++;
	y++;
	x--;
	int a1=pref1[y]-pref1[x];
	int b1=pref2[y]-pref2[x];
	int c1=pref3[y]-pref3[x];
	
	if(a1!=b1 || b1!=c1 || c1!=a1){
		return -1;
	}
	int sz=y-x;
	return (sz-abs(a1)-abs(b1)-abs(c1))/2+(abs(a1)+abs(b1)+abs(c1))/3*2;
}

int main() {
	int n, q;
	assert(scanf("%d %d", &n, &q) == 2);
	char A[n+1], B[n+1];
	assert(scanf("%s", A) == 1);
	assert(scanf("%s", B) == 1);
	std::string a = std::string(A);
	std::string b = std::string(B);
	std::vector<int> x(q), y(q);
	for (int i = 0; i < q; i++) {
		assert(scanf("%d %d", &x[i], &y[i]) == 2);
	}
	fclose(stdin);
	std::vector<int> results(q);
	init(a, b);
	for (int i = 0; i < q; i++) {
		results[i] = get_distance(x[i], y[i]);
	}
	for (int i = 0; i < q; i++) {
		printf("%d\n", results[i]);
	}
	fclose(stdout);
	return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccOqAxYP.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccppt4vP.o:dna.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status