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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define MOD 1000000007
  4. #define pii pair<int, int>
  5. #define pll pair<long long, long long>
  6. #define vi vector<int>
  7. #define pb push_back
  8. #define mp make_pair
  9. #define ALL(x) x.begin(),x.end()
  10. #define M(a,x) memset(a,x,sizeof(a))
  11. #define sci(x) scanf("%d",&x);
  12. #define scl(x) scanf("%lld",&x);
  13. #define scs(x) scanf("%s",x);
  14. #define print(x) printf("%d",x);
  15. #define nl printf("\n")
  16. #define fr first
  17. #define se second
  18. #define printl(x) printf("%lld",x)
  19. #define F(i,a,n) for(int i=a;i<n;i++)
  20. #define INF 100000000000000000LL
  21. #define LL long long
  22.  
  23. const int N = 1e3+5;
  24. int dp1[N][N];
  25. int dp2[N][N];
  26. int LCS1(string x,string y) {
  27. int n = x.size();
  28. int m = y.size();
  29. for(int i=0;i<=n;i++) {
  30. for(int j=0;j<=m;j++) {
  31. if(i==0 || j==0) {
  32. dp1[i][j] = 0;
  33. }
  34. else if(x[i-1] == y[j-1]) {
  35. dp1[i][j] =1+dp1[i-1][j-1];
  36. }
  37. else {
  38. dp1[i][j]= max(dp1[i-1][j],dp1[i][j-1]);
  39. }
  40. }
  41. }
  42. return dp1[n][m];
  43. }
  44. int LCS2(string x,string y) {
  45. int n = x.size();
  46. int m = y.size();
  47. for(int i=0;i<=n;i++) {
  48. for(int j=0;j<=m;j++) {
  49. if(i==0 || j==0) {
  50. dp2[i][j] = 0;
  51. }
  52. else if(x[i-1] == y[j-1]) {
  53. dp2[i][j] =1+dp2[i-1][j-1];
  54. }
  55. else {
  56. dp2[i][j]= max(dp2[i-1][j],dp2[i][j-1]);
  57. }
  58. }
  59. }
  60. return dp2[n][m];
  61. }
  62. bool mark1[27];
  63. bool mark2[27];
  64. int main() {
  65. int t;sci(t);
  66. while(t--) {
  67. M(mark1,0);
  68. M(mark2,0);
  69. string a,b,c,d;
  70. cin >> a >> b;
  71. c = a;
  72. reverse(c.begin(),c.end());
  73. d = b;
  74. reverse(d.begin(),d.end());
  75. int len1 = LCS1(a,c);
  76. int len2 = LCS2(b,d);
  77. if(len1%2 && len2%2) {
  78. int temp = (len1-1)/2;
  79. for(int i=0;i<a.size();i++) {
  80. if(dp1[i][a.size()-1-i] == temp) {
  81. mark1[a[i]-'a']=true;
  82. }
  83. }
  84. int temp2 = (len2-1)/2;
  85. for(int i=0;i<b.size();i++) {
  86. if(dp2[i][b.size()-1-i] == temp2) {
  87. mark2[b[i]-'a']=true;
  88. }
  89. }
  90. bool flag = false;
  91. for(int i=0;i<26;i++) {
  92. if(mark1[i] && (mark1[i] == mark2[i])) {
  93. flag = true;
  94. break;
  95. }
  96. }
  97. if(flag) {
  98. cout<<len1+len2<<endl;
  99. }
  100. else {
  101. cout<<len1+len2-1<<endl;
  102. }
  103. }
  104. else {
  105. cout<<len1+len2<<endl;
  106. }
  107. }
  108. }
Runtime error #stdin #stdout 0.11s 11360KB
stdin
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