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为什么判断a[i]>a[i+1]和a[i]<a[i+1]即可??AC的,但不知道怎么证明 if(a[i] > a[i+1]) { s = 1; t ++; for(j=i+1;j<=n;j++) { if( s==1&&a[i]<a[i+1] || s==0&&a[i]>a[i+1] ) { t ++; s^= 1; } } if(t > max) max = t; } Followed by:
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