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- // Tinh tong cuc tri cua mang
- // Khai bao cac ham thu vien neu co
- #include<stdio.h>
- #include<conio.h>
- #define SIZE 100
- void nhap(int a[],int &n)
- {
- scanf("%d",&n);
- for(int i=0;i<n;i++)
- {
- scanf("%d",&a[i]);
- }
- }
- long tongcuctri(int a[],int n)
- {
- long Tong=0;
- for(int i = 0; i < n; i++)
- {
- if(i == 0 && a[i] != a[i + 1]) // xét dau chuoi
- {
- Tong += a[i];
- }
- else if(i == n - 1 && a[i] != a[i - 1]) // xét duôi, vi tri nam cuoi chuoi
- {
- Tong += a[i];
- }
- else if((a[i] < a[i + 1] && a[i] < a[i - 1]) || (a[i] > a[i + 1] && a[i] > a[i - 1]))
- {
- Tong += a[i];
- }
- }
- return Tong;
- }
- void main()
- {
- int a[SIZE],n;
- nhap(a,n);
- printf("%ld",tongcuctri(a,n));
- }
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