Submission #1236965

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236965		i_love_mriti	Mutating DNA (IOI21_dna)	C++20	Compilation error	0 ms	0 KiB

dna

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

const int mxN = 2e5 + 1000;

string A, B;

void init(string a, string b){
	A = a, B = b;
}

int get_distance(int x, int y){
	int a = 0, c = 0, t = 0, good = 0, at = 0, ta = 0, ac = 0, ca = 0, tc = 0, ct = 0;
	for(int i = x; i <= y; ++i){
		a += A[i] == 'A';
		a -= B[i] == 'A';
		c += A[i] == 'C';
		c -= B[i] == 'C';
		t += A[i] == 'T';
		t -= B[i] == 'T';
		if(A[i] == 'A' && B[i] == 'T') ++at;
		else if(A[i] == 'T' && B[i] == 'A') ++ta;
		else if(A[i] == 'A' && B[i] == 'C') ++ac;
		else if(A[i] == 'C' && B[i] == 'A') ++ca;
		else if(A[i] == 'C' && B[i] == 'T') ++ct;
		else if(A[i] == 'T' && B[i] == 'C') ++tc;
		else ++good;
	}
	if(a == 0 && c == 0 && t == 0){
		if(good == (y - x + 1)) return 0;
		int hehehe = ((y - x + 1) - min(at, ta) * 2 - min(ac, ca) * 2 - min(tc, ct) * 2 - good);
		return min(at, ta) + min(ac, ca) + min(tc, ct) + (hehehe + 1) / 2;
	}else{
		return -1;
	}
}

int main(){
	#ifndef ONLINE_JUDGE
	freopen("inp.in", "r", stdin);
	freopen("output.out", "w", stdout);
	#endif

	ios_base::sync_with_stdio(0);
	cin.tie(nullptr); cout.tie(nullptr);

	init("ACTCAT", "TACACT");

	cout << get_distance(0, 5) << endl;

	return 0;
}

Compilation message (stderr)

dna.cpp: In function 'int main()':
dna.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen("inp.in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
dna.cpp:42:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |         freopen("output.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccTfoxVS.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccY4jrbf.o:dna.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status