Coffee shops

input/code.cpp: In function 'int main()':
input/code.cpp:4:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&n);
   ~~~~~^~~~~~~~~
input/code.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&c);
     ~~~~~^~~~~~~~~

#include <stdio.h>
int main(){
  int n,i,c,a[3],b[3];
  scanf("%d",&n);
  a[1]=b[1]=0;
  a[2]=b[2]=1e9;
  a[0]=b[0]=1e9;
  for(i=0;i<n;++i){
    scanf("%d",&c);
    b[0]=a[0];
    b[1]=a[1];
    b[2]=a[2];
    a[0]=b[0]+c;
    if(a[0]>(b[1]+c))a[0]=b[1]+c;
    if(a[0]>(b[2]+c))a[0]=b[2]+c;
    a[1]=b[0];
    a[2]=b[1];
  }
  if(a[0]>a[1])a[0]=a[1];
  printf("%d\n",a[0]);
  return 0;
}

Test 1

Verdict: UNKNOWN

Test 2

Verdict: UNKNOWN

Test 3

Verdict: UNKNOWN

Test 4

Verdict: UNKNOWN

Test 5

Verdict: UNKNOWN

Test 6

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Test 7

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Test 8

Verdict: UNKNOWN

Test 9

Verdict: UNKNOWN

Test 10

Verdict: UNKNOWN

Test 11

Verdict: UNKNOWN

Test 12

Verdict: UNKNOWN

Test 13

Verdict: UNKNOWN

Test 14

Verdict: UNKNOWN

Test 15

Verdict: UNKNOWN

Test 16

Verdict: UNKNOWN

Test 17

Verdict: UNKNOWN

Test 18

Verdict: UNKNOWN