Submission #765952

#	Time	Username	Problem	Language	Result	Execution time	Memory
765952		tengiz05	Seats (IOI18_seats)	C++17	17 / 100	4059 ms	55396 KiB

seats

#include "seats.h"
#include "iostream"
#ifndef EVAL
#include "grader.cpp"
#endif

using namespace std;
vector<int> r, c;
vector<int> minx, maxx, miny, maxy;
int n, m;
int ans = 0;
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
    n = H;
    m = W;
    r = R;
    c = C;
    minx.resize(n * m, n);
    maxx.resize(n * m, -1);
    miny.resize(n * m, m);
    maxy.resize(n * m, -1);
    for (int i = 0; i < n * m; i++) {
        if (i == 0) {
            minx[i] = maxx[i] = r[i];
            miny[i] = maxy[i] = c[i];
        } else {
            minx[i] = min(minx[i - 1], r[i]);
            maxx[i] = max(maxx[i - 1], r[i]);
            miny[i] = min(miny[i - 1], c[i]);
            maxy[i] = max(maxy[i - 1], c[i]);
        }
        if ((maxx[i] - minx[i] + 1) * (maxy[i] - miny[i] + 1) == i + 1) {
            ans++;
        }
    }
}

int swap_seats(int a, int b) {
    if (a > b) swap(a, b);
    swap(r[a], r[b]);
    swap(c[a], c[b]);
    for (int i = a; i < b; i++) {
        if ((maxx[i] - minx[i] + 1) * (maxy[i] - miny[i] + 1) == i + 1) {
            ans--;
        }
        if (i == 0) {
            minx[i] = maxx[i] = r[i];
            miny[i] = maxy[i] = c[i];
        } else {
            minx[i] = min(minx[i - 1], r[i]);
            maxx[i] = max(maxx[i - 1], r[i]);
            miny[i] = min(miny[i - 1], c[i]);
            maxy[i] = max(maxy[i - 1], c[i]);
        }
        if ((maxx[i] - minx[i] + 1) * (maxy[i] - miny[i] + 1) == i + 1) {
            ans++;
        }
    }
    return ans;
}

/*

2 3 2
0 0  
1 0
1 1
0 1
0 2
1 2
0 5
0 5


*/

• Subtask 1: 5 / 5
• Subtask 2: 6 / 6
• Subtask 3: 0 / 20
• Subtask 4: 6 / 6
• Subtask 5: 0 / 33
• Subtask 6: 0 / 30