QOJ.ac
QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#855102 | #9925. LR String | Repeater | WA | 372ms | 3824kb | C++20 | 1.5kb | 2025-01-12 14:36:14 | 2025-01-12 14:36:15 |
Judging History
answer
#include <bits/stdc++.h>
void solve()
{
std::string s; std::cin >> s;
int n = s.size();
std::vector nxt(100, std::vector<int>(n, -1));
std::vector<std::vector<int>> pos(100);
std::vector<int> lst(100, -1);
for(int i = 0; i < n; i++)
{
if(lst[s[i]] != -1) nxt[s[i]][lst[s[i]]] = i;
lst[s[i]] = i;
pos[s[i]].emplace_back(i);
}
if(!pos['L'].empty()) nxt['L'][pos['L'].back()] = n;
if(!pos['R'].empty()) nxt['R'][pos['R'].back()] = n;
for(int i = 1; i < n; i++)
{
nxt['L'][i] = std::max(nxt['L'][i], nxt['L'][i - 1]);
nxt['R'][i] = std::max(nxt['R'][i], nxt['R'][i - 1]);
}
int q; std::cin >> q;
while(q--)
{
std::string t; std::cin >> t;
int m = t.size();
if(m == 1)
{
if(t == "R" && s.front() == 'R') std::cout << "YES\n";
else if(t == "L" && s.back() == 'L') std::cout << "YES\n";
else std::cout << "NO\n";
continue;
}
if(t.front() == 'R' && s.front() != 'R')
{
std::cout << "NO\n";
continue;
}
if(pos[t[0]].empty())
{
std::cout << "NO\n";
continue;
}
int cur = pos[t[0]][0];
bool ok = true;
for(int i = 1; i < m && cur < n; i++)
{
int ncur = nxt[t[i]][cur];
if(s[i - 1] == 'L' && s[i] == 'R' && ncur - cur > 1) ok = false;
cur = ncur;
}
if(cur >= n) ok = false;
if(ok) std::cout << "YES\n";
else std::cout << "NO\n";
}
}
int main()
{
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
int t; std::cin >> t;
while(t--) solve();
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3560kb
input:
2 RRLLRRLL 4 LLLLL LLR LRLR R RLLLLLL 3 LLLLL RL RRL
output:
NO YES NO YES YES YES NO
result:
ok 7 lines
Test #2:
score: -100
Wrong Answer
time: 372ms
memory: 3824kb
input:
100000 RRLLR 4 R R R R LRLLL 6 R L L L L R RLLRR 1 L LRLLL 3 R L L RLRRL 2 LRRRR RRRL LRLRR 2 L R RRLRL 4 RLRLR RLLL LR RLL RLRLL 8 R R R L L L R L RLLRR 7 R LL RL R L L L LLRLR 2 L R RRRRL 1 RLLLR RRLLL 2 L L RLLRL 1 RLLRL LRLLL 5 RLRLL RLLLR RRRRL LLRRR RLLRR LRLLL 3 RRLL R RL LLRRL 3 L R LLLRR RR...
output:
YES YES YES YES NO YES YES YES YES NO NO NO YES YES NO YES NO NO YES YES YES YES YES YES YES YES YES YES YES YES YES YES YES YES NO NO NO NO NO YES YES YES NO NO NO NO NO NO NO NO NO YES NO NO NO YES YES NO NO NO NO NO NO NO NO NO YES YES YES YES YES YES YES NO NO NO NO YES NO NO YES YES YES NO YES ...
result:
wrong answer 19th lines differ - expected: 'NO', found: 'YES'