Submission #437307

#	Time	Username	Problem	Language	Result	Execution time	Memory
437307		DunderMifflin	Mutating DNA (IOI21_dna)	C++17	Compilation error	0 ms	0 KiB

dna

#include "dna.h"
#include<map>

const int N = 123456;

int pref[3][3][N];
int asum[3][N];
int bsum[3][N];
map<char, int> f;

void init(std::string a, std::string b) {
	f['A'] = 0; f['C'] = 1; f['T'] = 2;
	int n = (int) a.size(); 
	a = " " + a;
	b = " " + b;
	for (int i = 1; i <= n; i++) {
		for (int k = 0; k < 3; k++) {
			for (int l = 0; l < 3; l++) {
				pref[k][l][i] = pref[k][l][i - 1] + (f[a[i]] == k && f[b[i]] == l);
			}
			asum[k][i] = asum[k][i - 1] + (f[a[i]] == k);
			bsum[k][i] = bsum[k][i - 1] + (f[b[i]] == k);
		}
	}
}

int get_distance(int x, int y) {
	x++; y++;
	for (int t = 0; t < 3; t++) {
		if (asum[t][y] - asum[t][x - 1] != bsum[t][y] - bsum[t][x - 1]) {
			return -1;
		}
	}
	int ans = 0;
	for (int k = 0; k < 3; k++) {
		for (int l = k + 1; l < 3; l++) {
			ans += pref[k][l][y] - pref[k][l][x - 1];
		}
	}
	return ans;
}

Compilation message (stderr)

dna.cpp:9:1: error: 'map' does not name a type
    9 | map<char, int> f;
      | ^~~
dna.cpp: In function 'void init(std::string, std::string)':
dna.cpp:12:2: error: 'f' was not declared in this scope
   12 |  f['A'] = 0; f['C'] = 1; f['T'] = 2;
      |  ^