Submission #474618

#	Time	Username	Problem	Language	Result	Execution time	Memory
474618		sean617	Matryoshka (JOI16_matryoshka)	C++98	100 / 100	228 ms	16072 KiB

matryoshka

#include<iostream>
#include<cstdio>
#include<algorithm>
#define N 400005
using namespace std;

int n, m, M = 1e9, sz, b[N], ans[N];
struct str {
    int r, h, z, num;
} a[N];

bool comp(str p, str q) {
    if (p.h != q.h) return p.h < q.h;
    else if (p.r != q.r) return p.r > q.r;
    else return p.z < q.z;
}

int main() {
    int i, j, x, t;
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m;
    for (i = 0; i < n; i++) {
        cin >> a[i].r >> a[i].h;
        a[i].z = a[i].num = 0;
    }
    for (i = 0; i < m; i++) {
        cin >> a[n + i].r >> a[n + i].h;
        a[n + i].z = 1;
        a[n + i].num = i;
    }
    sort(a, a + n + m, comp);
    for (i = 0; i < n + m; i++) {
        x = M - a[i].r;
        t = upper_bound(b, b + sz, x) - b;
        if (a[i].z == 1) {
            ans[a[i].num] = t;
        } else {
            b[t] = x;
            if (t == sz) sz++;
        }
    }
    for (i = 0; i < m; i++) {
        printf("%d\n", ans[i]);
    }
    return 0;
}

Compilation message (stderr)

matryoshka.cpp: In function 'int main()':
matryoshka.cpp:19:12: warning: unused variable 'j' [-Wunused-variable]
   19 |     int i, j, x, t;
      |            ^

• Subtask 1: 11 / 11
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25
• Subtask 4: 49 / 49