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- #include <iostream>
- int main() {
- int N, b[10], min=1000, f, x;
- scanf("%d", &N);
- int a[N];
- for(int i=0;i<10;i++){
- b[i]=0;
- }
- for(int i=0;i<N;i++){
- scanf("%d", &a[i]);
- }
- for(int i=0;i<N;i++){
- while(a[i]>0){
- f=a[i]%10;
- a[i]=a[i]/10;
- }
- b[f]=b[f]+1;
- }
- for(int i=0;i<10;i++){
- if((b[i]<min)&&(b[i]!=0)){
- min=b[i];
- }
- }
- for(int i=0;i<10;i++){
- if((b[i]==min)&&(min!=x)){
- x=min;
- printf("%d", i);
- }
- }
- }
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