Palindrome

input/code.cpp: In function 'int main()':
input/code.cpp:14:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",v);
                ^

#include <stdio.h>
#include <string.h>
char v[2020];
int k[2020];
int vv[2020][2020];
int mn(int a,int b){return a<b?a:b;}
int ed(int a, int b){
  if(a>=b)return 0;
  if(vv[a][b])return vv[a][b]-1;
  if(v[a]==v[b])return (vv[a][b]=ed(a+1,b-1)+1)-1;
  return (vv[a][b]=mn(ed(a+1,b),mn(ed(a+1,b-1),ed(a,b-1)))+2)-1;
}
int main(){
  scanf("%s",v);
  size_t n = strlen(v);
  printf("%d\n",ed(0,n-1));
  return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED

Test 22

Verdict: ACCEPTED

Test 23

Verdict: ACCEPTED

Test 24

Verdict: ACCEPTED

Test 25

Verdict: ACCEPTED

Test 26

Verdict: ACCEPTED

Test 27

Verdict: ACCEPTED

Test 28

Verdict: ACCEPTED

Test 29

Verdict: ACCEPTED

Test 30

Verdict: ACCEPTED