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Submission #342718

# Submission time Handle Problem Language Result Execution time Memory
342718 2021-01-02T16:40:19 Z koketsu Chessboard (IZhO18_chessboard) C++14
16 / 100
 33 ms 1516 KB 
#include <bits/stdc++.h>
#define pb push_back
#define LL long long
#define Kultivator ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define int LL

using namespace std;

const LL Mxn = 1e6 + 7;
const LL Mod = 1e9 + 7;
const LL Inf = 1e14 + 7;

bool Prime(int N){
    bool Used = false;
    for(int i = 2; i <= sqrt(N); i++){
        if(N % i == 0){
            Used = true;
            break;
        }
    }
    return Used;
}

bool Get(int x, int y, int d){
    return (x / d + y / d) % 2;
}

void Ans1(int N){
    int Ans = Mxn;
    for(int i = 1; i < N; i++){
        if(N % i == 0){
            Ans = min(Ans, (N * N) / (2 * i * i) * (i * i));
        }
    }
    cout << Ans;
}

void Ans2(int N, int K){
    LL Cnt1 = 0, Cnt2 = 0;
    for(int i = 1, x1, y1, x2, y2; i <= K; i++){
        cin >> x1 >> y1 >> x2 >> y2;
        bool Num = Get(x2, y2, 1);
        if(!Num){
            Cnt1++;
        } else {
            Cnt2++;
        }
    }
    cout << min(N * N / 2 - Cnt2 + Cnt1, N * N / 2 + 1 - Cnt1 + Cnt2);
}

void Ans3(int N, int K){
    int Ans = LONG_MAX;
    vector <int> F;
    vector <pair <int, int>> P(N, {0, 0});
    for(int i = 1; i <= sqrt(N); i++){
        if(N % i == 0){
            F.pb(i);
            if(N / i != i && i > 1){
                F.pb(N / i);
            }
        }
    }
    for(int i = 1, x1, y1, x2, y2; i <= K; i++){
        cin >> x1 >> y1 >> x2 >> y2;
        for(auto i : F){
            if(Get(x1, y1, i)){
                P[i].first++;
            } else {
                P[i].second++;
            }
        }
    }
    for(auto i : F){
        Ans = min(Ans, ((N * N) / (2 * i * i)) * (i * i) + (i * i) + P[i].first - P[i].second);
        Ans = min(Ans, ((N * N) / (2 * i * i)) * (i * i) - P[i].first + P[i].second);
    }
    cout << Ans;
}

signed main(){
    Kultivator;
    LL N, K;
    cin >> N >> K;
    if(!K){
        Ans1(N);
    } else if(!Prime(N)){
        Ans2(N, K);
    } else {
        Ans3(N, K);
    }
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 1004 KB Output is correct
2 Correct 7 ms 620 KB Output is correct
3 Correct 15 ms 1004 KB Output is correct
4 Correct 18 ms 1132 KB Output is correct
5 Correct 20 ms 1004 KB Output is correct
6 Correct 13 ms 1004 KB Output is correct
7 Correct 3 ms 492 KB Output is correct
8 Correct 15 ms 1004 KB Output is correct
9 Correct 33 ms 1516 KB Output is correct
10 Correct 20 ms 1004 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 1004 KB Output is correct
2 Correct 7 ms 620 KB Output is correct
3 Correct 15 ms 1004 KB Output is correct
4 Correct 18 ms 1132 KB Output is correct
5 Correct 20 ms 1004 KB Output is correct
6 Correct 13 ms 1004 KB Output is correct
7 Correct 3 ms 492 KB Output is correct
8 Correct 15 ms 1004 KB Output is correct
9 Correct 33 ms 1516 KB Output is correct
10 Correct 20 ms 1004 KB Output is correct
11 Incorrect 1 ms 492 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 23 ms 1004 KB Output is correct
10 Correct 7 ms 620 KB Output is correct
11 Correct 15 ms 1004 KB Output is correct
12 Correct 18 ms 1132 KB Output is correct
13 Correct 20 ms 1004 KB Output is correct
14 Correct 13 ms 1004 KB Output is correct
15 Correct 3 ms 492 KB Output is correct
16 Correct 15 ms 1004 KB Output is correct
17 Correct 33 ms 1516 KB Output is correct
18 Correct 20 ms 1004 KB Output is correct
19 Incorrect 1 ms 492 KB Output isn't correct
20 Halted 0 ms 0 KB -