16 lines
201 B
C++
16 lines
201 B
C++
#include<cstdio>
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int n,res,last,x;
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int main()
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{
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scanf("%d%d",&n,&last);
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res=last;
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for(int i=2;i<=n;i++)
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{
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scanf("%d",&x);
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if(x>last) res+=x-last;
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last=x;
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}
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printf("%d\n",res);
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return 0;
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}
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