最小表示法，感觉可以做成个模板，第一次RE是因为字符串长度变2倍了而我把数组开小了
Executing...
Test 1: TEST OK [0.008 secs, 3760 KB]
Test 2: TEST OK [0.005 secs, 3760 KB]
Test 3: TEST OK [0.005 secs, 3760 KB]
Test 4: TEST OK [0.008 secs, 3760 KB]
Test 5: TEST OK [0.005 secs, 3760 KB]
Test 6: TEST OK [0.003 secs, 3760 KB]
Test 7: TEST OK [0.008 secs, 3760 KB]
Test 8: TEST OK [0.008 secs, 3760 KB]
Test 9: TEST OK [0.024 secs, 3760 KB]
Test 10: TEST OK [0.014 secs, 3760 KB]
Test 11: TEST OK [0.019 secs, 3760 KB]
Test 12: TEST OK [0.005 secs, 3760 KB]
Test 13: TEST OK [0.003 secs, 3760 KB]
Test 14: TEST OK [0.008 secs, 3760 KB]
All tests OK.
1 #include <iostream> 2 #include <stdio.h> 3 #include <string.h> 4 using namespace std; 5 6 char getch2() 7 { 8 char c; 9 while(c=getchar(),c==' '); 10 return c; 11 } 12 13 char a[200010]; 14 char strTmp[200010]; 15 int main() 16 { 17 freopen("hidden.in","r",stdin); 18 freopen("hidden.out","w",stdout); 19 int n; 20 cin>>n; 21 22 for(int i=0;i<n;i++) 23 { 24 a[i]=getch2(); 25 } 26 27 a[n]=' '; 28 29 30 strcpy(strTmp,a); 31 strcat(a,strTmp); 32 33 int i=0,j=1; 34 while(j<n) 35 { 36 int k; 37 for(k=0;k<n;k++) 38 { 39 if(a[i+k]!=a[j+k]) 40 break; 41 } 42 if(k==n) 43 break; 44 if(a[i+k]>a[j+k]) 45 i+=k+1; 46 if(a[i+k]<a[j+k]) 47 j+=k+1; 48 49 if(i==j) 50 j++; 51 } 52 53 cout<<i<<endl; 54 return 0; 55 }