Submission #1870584
Source Code Expand
#include <bits/stdc++.h> using namespace std; #define FOR(i,a,b) for(int i = (a); i < (b); i++) #define RFOR(i,b,a) for(int i = (b) - 1; i >= (a); i--) #define ITER(it, a) for(typeof(a.begin()) it = a.begin(); it != a.end(); it++) #define FILL(a, value) memset(a, value, sizeof(a)) #define SZ(a) (int) a.size() #define ALL(a) a.begin(),a.end() #define PB push_back #define MP make_pair typedef long long LL; typedef vector<int> VI; typedef pair<int, int> PII; const double PI = acos(-1.0); const LL INF = 1000 * 1000 * 1000 + 7; const LL LINF = INF * (LL)INF; string s; void go() { int x = 0; int d = 1; while(true) { if (x < 0 || x >= SZ(s)) break; if (s[x] == 'B') { s[x] = 'A'; x += d; continue; } if (s[x] == 'A') { s[x] = 'B'; d *= -1; x += d; } } } string gen(string s, int k) { VI a; FOR (i, 0, SZ(s)) { a.PB(s[i] == 'A'); } int ind = 0; int cnt = 0; while(k > 0) { if (ind >= SZ(a)) { break; } k--; if ((a[ind] ^ cnt) == 1) { a[ind]^= 1; continue; } ind++; cnt ^= 1; } string res; FOR (i, ind, SZ(a)) { res += "BA"[a[i] ^ cnt]; } int left = SZ(a) - SZ(res); if (left & 1) res += 'A', left--; FOR (i, 0, left/2) res += "BA"; if ((k & 1) && (SZ(a) & 1)) { if (res[0] == 'A') res[0] = 'B'; else res[0] = 'A'; } return res; } int main() { //freopen("in.txt", "r", stdin); ios::sync_with_stdio(false); cin.tie(0); int n, k; cin>>n>>k; string s; cin>>s; cout<<gen(s, k)<<endl; /*s = "BAAABBBABBBAAB"; s = "BBAABAABBABABAABAAAAABABBBABBAAAB"; s=""; int len = 47; FOR (i, 0, len) { s += "AB"[rand() % 2]; } //s = "BABB"; string ss = s; int k = 4002; cout<<s<<endl; FOR (it, 0, k) { go(); cout<<s<<endl; } cout<<gen(ss, k)<<endl; if (gen(ss, k) != s) throw -1;*/ }
Submission Info
Submission Time | |
---|---|
Task | D - Half Reflector |
User | vjudge4 |
Language | C++14 (GCC 5.4.1) |
Score | 900 |
Code Size | 1817 Byte |
Status | AC |
Exec Time | 5 ms |
Memory | 1936 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 900 / 900 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | sample1.txt, sample2.txt, sample3.txt |
All | sample1.txt, sample2.txt, sample3.txt, in1.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in2.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in28.txt, in29.txt, in3.txt, in30.txt, in31.txt, in32.txt, in33.txt, in34.txt, in35.txt, in36.txt, in37.txt, in38.txt, in39.txt, in4.txt, in40.txt, in41.txt, in42.txt, in5.txt, in543.txt, in557.txt, in6.txt, in7.txt, in8.txt, in9.txt, sample1.txt, sample2.txt, sample3.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
in1.txt | AC | 1 ms | 256 KB |
in10.txt | AC | 5 ms | 1932 KB |
in11.txt | AC | 5 ms | 1932 KB |
in12.txt | AC | 5 ms | 1932 KB |
in13.txt | AC | 5 ms | 1932 KB |
in14.txt | AC | 5 ms | 1932 KB |
in15.txt | AC | 5 ms | 1932 KB |
in16.txt | AC | 5 ms | 1932 KB |
in17.txt | AC | 5 ms | 1932 KB |
in18.txt | AC | 5 ms | 1932 KB |
in19.txt | AC | 5 ms | 1932 KB |
in2.txt | AC | 2 ms | 1100 KB |
in20.txt | AC | 5 ms | 1932 KB |
in21.txt | AC | 5 ms | 1932 KB |
in22.txt | AC | 5 ms | 1932 KB |
in23.txt | AC | 5 ms | 1932 KB |
in24.txt | AC | 5 ms | 1932 KB |
in25.txt | AC | 5 ms | 1932 KB |
in26.txt | AC | 5 ms | 1932 KB |
in27.txt | AC | 5 ms | 1932 KB |
in28.txt | AC | 4 ms | 1932 KB |
in29.txt | AC | 4 ms | 1932 KB |
in3.txt | AC | 5 ms | 1932 KB |
in30.txt | AC | 5 ms | 1932 KB |
in31.txt | AC | 5 ms | 1932 KB |
in32.txt | AC | 5 ms | 1932 KB |
in33.txt | AC | 5 ms | 1932 KB |
in34.txt | AC | 5 ms | 1932 KB |
in35.txt | AC | 5 ms | 1932 KB |
in36.txt | AC | 5 ms | 1932 KB |
in37.txt | AC | 5 ms | 1932 KB |
in38.txt | AC | 5 ms | 1932 KB |
in39.txt | AC | 4 ms | 1932 KB |
in4.txt | AC | 5 ms | 1932 KB |
in40.txt | AC | 4 ms | 1932 KB |
in41.txt | AC | 4 ms | 1932 KB |
in42.txt | AC | 4 ms | 1932 KB |
in5.txt | AC | 5 ms | 1936 KB |
in543.txt | AC | 4 ms | 1932 KB |
in557.txt | AC | 4 ms | 1932 KB |
in6.txt | AC | 1 ms | 256 KB |
in7.txt | AC | 5 ms | 1932 KB |
in8.txt | AC | 5 ms | 1932 KB |
in9.txt | AC | 5 ms | 1932 KB |
sample1.txt | AC | 1 ms | 256 KB |
sample2.txt | AC | 1 ms | 256 KB |
sample3.txt | AC | 1 ms | 256 KB |