oj.uz

답안 #479066

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
479066 2021-10-09T21:05:54 Z Green55 원형 문자열 (IZhO13_rowords) C++17
76 / 100
 164 ms 332 KB 
#include<bits/stdc++.h>
using namespace std;
#define all(v) (v).begin(), (v).end()

#define uint unsigned long long
#define ull unsigned __int128

const int LEN = 64;
const int MAX = 2205 + LEN;

inline bool at(uint a[], int i){
    return a[i/LEN] & ((uint)1 << (i%LEN));
}

inline bool tog(uint a[], int i) {
    return a[i/LEN] ^= ((uint)1 << (i%LEN));
}

int n;
string s, t;
uint a[MAX/LEN], b[MAX/LEN], cs[26][MAX/LEN];

void solve(uint c[]){
    //sliding b -> a
    memcpy(a, b, sizeof(b));
    memset(b, 0, sizeof(b));
    
    // b = (a << 1) | 1
    uint carry = 1;
    for(int i=0; i<n/LEN; ++i) {
        b[i] = (a[i] << 1) | carry;
        carry = bool(a[i] & ((uint)1<<(LEN-1)));
    }

    // b = -b = ~b + 1
    for(int i=0; i<n/LEN; ++i) b[i] = ~b[i];
    for(int i=0; i<n; ++i) if(tog(b, i)) break;

    // a |= c, b += a, b &= a, b ^= a
    carry = 0;
    for(int i=0; i<n/LEN; ++i) {
        a[i] |= c[i];
        ull tmp = b[i]; tmp += a[i]; tmp += carry;
        b[i] = tmp & (~(uint)0);
        carry = tmp >> LEN;

        b[i] &= a[i];
        b[i] ^= a[i];
    }
}

int solve_tc(string s, string t) {
    memset(a, 0, sizeof(a));
    memset(b, 0, sizeof(b));
    memset(cs, 0, sizeof(cs));

    // init c['A'] ~ c['Z']
    for(int i=0; i<t.size(); ++i) {
        tog(cs[t[i] - 'a'], i);
    }
    n = (t.size()/LEN+1)*LEN;

    for(int idx=0; idx<s.size(); ++idx) {
        char c = s[idx];
        solve(cs[c - 'a']);
    }

    int ret = 0;
    for(int i=0; i<n; ++i){
        ret += at(b, i);
    }
    // cout << s << ' ' << t << " : " << ret << endl;
    return ret;
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

    string a, b;
    cin >> a >> b;
    for(char c : a) assert(islower(c));
    for(char c : b) assert(islower(c));
    int ans = 0;
    for(int i=0; i<b.size(); ++i){
        ans = max(ans, solve_tc(a, b));
        b.push_back(b[0]);
        b.erase(b.begin());
    }
    cout << ans;
}

Compilation message

rowords.cpp: In function 'int solve_tc(std::string, std::string)':
rowords.cpp:58:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(int i=0; i<t.size(); ++i) {
      |                  ~^~~~~~~~~
rowords.cpp:63:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for(int idx=0; idx<s.size(); ++idx) {
      |                    ~~~^~~~~~~~~
rowords.cpp: In function 'int main()':
rowords.cpp:84:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |     for(int i=0; i<b.size(); ++i){
      |                  ~^~~~~~~~~

Subtask #1
76.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 6 ms 204 KB Output is correct
7 Correct 116 ms 320 KB Output is correct
8 Incorrect 120 ms 204 KB Output isn't correct
9 Correct 110 ms 320 KB Output is correct
10 Correct 110 ms 300 KB Output is correct
11 Correct 122 ms 312 KB Output is correct
12 Correct 145 ms 284 KB Output is correct
13 Correct 162 ms 304 KB Output is correct
14 Correct 130 ms 308 KB Output is correct
15 Correct 164 ms 204 KB Output is correct
16 Correct 116 ms 332 KB Output is correct
17 Incorrect 69 ms 324 KB Output isn't correct
18 Correct 133 ms 204 KB Output is correct
19 Correct 111 ms 204 KB Output is correct
20 Incorrect 118 ms 204 KB Output isn't correct
21 Correct 16 ms 204 KB Output is correct
22 Correct 29 ms 204 KB Output is correct
23 Correct 45 ms 204 KB Output is correct
24 Incorrect 46 ms 304 KB Output isn't correct
25 Incorrect 66 ms 204 KB Output isn't correct