#include <iostream>
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 3010;
string a,b;
int lss[MAXN][MAXN];
int lsp[MAXN][MAXN];
int lps[MAXN][MAXN];
bool rev;
int maxlen,startA,startB;
void solve(){
for(int i=0;i<=3010;i++){
for(int j=0;j<=3010;j++){
lss[i][j] = 0;
lps[i][j] = 0;
lsp[i][j] = 0;
}
}
for(int j=0;j<b.size();j++){
for(int i=0;i<a.size() && (i+j)<b.size();i++){
if(a[i] == b[j+i]){
if(i){
lss[i][j+i] = lss[i-1][j+i-1]+1;
}else{
lss[i][j+i] = 1;
}
}else{
lss[i][j+i] = 0;
}
}
}
for(int j=0;j<a.size();j++){
for(int i=0;i<b.size() && j+i<a.size();i++){
if(a[i+j] == b[i]){
if(i){
lss[i+j][i] = lss[i+j-1][i-1]+1;
}else{
lss[i+j][i] =1;
}
}else{
lss[i+j][i] = 0;
}
}
}
for(int i=0;i<a.size();i++){
for(int j=0;j<b.size();j++){
int x = lss[i][j];
if(x == 0){
continue;
}
if(j-x>=0){
lsp[i][j-x] = max(lsp[i][j-x],x);
}
if(i-x>=0){
lps[i-x][j] = max(lps[i-x][j],x);
}
}
}
for(int i=0;i<a.size();i++){
for(int j=1;j<b.size();j++){
lsp[i][j] = max(lsp[i][j],lsp[i][j-1]-1);
}
}
for(int i=0;i<a.size();i++){
for(int j=0;j<b.size();j++){
int x = lsp[i][j];
int y = lps[i][j];
if(x+y>maxlen){
maxlen = x+y;
startA = i-x+1;
startB = j-y+1;
if(rev){
startB = b.size()-(j+x+1);
}
}
}
}
}
int main(){
cin>>a;
cin>>b;
solve();
reverse(b.begin(),b.end());
rev = 1;
solve();
cout<<maxlen<<endl;
cout<<startA<<" "<<startB<<endl;
}
Compilation message
necklace.cpp: In function 'void solve()':
necklace.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0;j<b.size();j++){
~^~~~~~~~~
necklace.cpp:20:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<a.size() && (i+j)<b.size();i++){
~^~~~~~~~~
necklace.cpp:20:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<a.size() && (i+j)<b.size();i++){
~~~~~^~~~~~~~~
necklace.cpp:32:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0;j<a.size();j++){
~^~~~~~~~~
necklace.cpp:33:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<b.size() && j+i<a.size();i++){
~^~~~~~~~~
necklace.cpp:33:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<b.size() && j+i<a.size();i++){
~~~^~~~~~~~~
necklace.cpp:45:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<a.size();i++){
~^~~~~~~~~
necklace.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0;j<b.size();j++){
~^~~~~~~~~
necklace.cpp:59:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<a.size();i++){
~^~~~~~~~~
necklace.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=1;j<b.size();j++){
~^~~~~~~~~
necklace.cpp:64:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<a.size();i++){
~^~~~~~~~~
necklace.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0;j<b.size();j++){
~^~~~~~~~~
necklace.cpp:14:23: warning: iteration 3010 invokes undefined behavior [-Waggressive-loop-optimizations]
lss[i][j] = 0;
~~~~~~~~~~^~~
necklace.cpp:13:22: note: within this loop
for(int j=0;j<=3010;j++){
~^~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
196 ms |
216056 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
196 ms |
216056 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
196 ms |
216056 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
