oj.uz

Submission #5765

# Submission time Handle Problem Language Result Execution time Memory
5765 2014-05-17T01:05:57 Z tncks0121 Watching (JOI13_watching) C++
100 / 100
 328 ms 17404 KB 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <limits.h>
#include <bits/stdc++.h>
#include <memory.h>

typedef long long ll;
typedef unsigned long long llu;
typedef double lf;
typedef long double llf;
typedef unsigned int uint;

using namespace std;

const int N_ = 2005;

int N, P, Q, A[N_];
int res;

int Table[N_][N_];
int X[N_], Y[N_];

bool possible (int w) {
    for(int i = 1, j = 1; i <= N; i++) {
        while(A[j] - A[i] < w && j <= N) ++j;
        X[i] = --j;
    }

    for(int i = 1, j = 1; i <= N; i++) {
        while(A[j] - A[i] < w+w && j <= N) ++j;
        Y[i] = --j;
    }

    X[N+1] = Y[N+1] = N;

    for(int i = 0; i <= P; i++) {
        for(int j = 0; j <= Q; j++) Table[i][j] = 0;
    }

    for(int i = 0; i <= P; i++) {
        for(int j = 0; j <= Q; j++) {
            if(i < P) Table[i+1][j] = max(Table[i+1][j], X[Table[i][j] + 1]);
            if(j < Q) Table[i][j+1] = max(Table[i][j+1], Y[Table[i][j] + 1]);
        }
    }

    return Table[P][Q] >= N;
}

int main() {
    scanf("%d%d%d", &N, &P, &Q);
    if(P + Q >= N) {
        puts("1");
        return 0;
    }

    for(int i = 1; i <= N; i++) scanf("%d", A+i);
    sort(A+1, A+N+1);
    N = unique(A+1, A+N+1) - (A+1);

    int low = 0, high = (int)1e9;
    while(low <= high) {
        int mid = (low + high) >> 1;
        if(possible(mid)) {
            res = mid;
            high = mid - 1;
        }else {
            low = mid + 1;
        }
    }

    printf("%d\n", res);
    return 0;
}

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 17404 KB Output is correct
2 Correct 0 ms 17404 KB Output is correct
3 Correct 0 ms 17404 KB Output is correct
4 Correct 0 ms 17404 KB Output is correct
5 Correct 0 ms 17404 KB Output is correct
6 Correct 0 ms 17404 KB Output is correct
7 Correct 0 ms 17404 KB Output is correct
8 Correct 0 ms 17404 KB Output is correct
9 Correct 0 ms 17404 KB Output is correct
10 Correct 0 ms 17404 KB Output is correct
11 Correct 0 ms 17404 KB Output is correct
12 Correct 0 ms 17404 KB Output is correct
13 Correct 0 ms 17404 KB Output is correct
14 Correct 0 ms 17404 KB Output is correct
15 Correct 0 ms 17404 KB Output is correct

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 17404 KB Output is correct
2 Correct 0 ms 17404 KB Output is correct
3 Correct 0 ms 17404 KB Output is correct
4 Correct 0 ms 17404 KB Output is correct
5 Correct 0 ms 17404 KB Output is correct
6 Correct 0 ms 17404 KB Output is correct
7 Correct 0 ms 17404 KB Output is correct
8 Correct 32 ms 17404 KB Output is correct
9 Correct 32 ms 17404 KB Output is correct
10 Correct 52 ms 17404 KB Output is correct
11 Correct 56 ms 17404 KB Output is correct
12 Correct 328 ms 17404 KB Output is correct
13 Correct 0 ms 17404 KB Output is correct
14 Correct 0 ms 17404 KB Output is correct
15 Correct 0 ms 17404 KB Output is correct