Submission #635624

#	Time	Username	Problem	Language	Result	Execution time	Memory
635624		aris12345678	Just Long Neckties (JOI20_ho_t1)	C++14	100 / 100	115 ms	11064 KiB

ho_t1

#include <bits/stdc++.h>
using namespace std;

typedef pair<int, int> pii;
#define X first
#define Y second

int main() {
    int n;
    scanf("%d", &n);
    vector<pii> a(n+1);
    vector<int> b(n);
    for(int i = 0; i <= n; i++) {
        scanf("%d", &a[i].X);
        a[i].Y = i;
    }
    for(int i = 0; i < n; i++)
        scanf("%d", &b[i]);
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    vector<int> pref;
    pref.push_back(max(a[0].X-b[0], 0));
    for(int i = 1; i < n; i++)
        pref.push_back(max(pref.back(), a[i].X-b[i]));

    // for(int i = 0; i < n; i++)
    //     printf("%d ", pref[i]);
    // printf("\n");

    vector<int> suf;
    suf.push_back(max(a[n].X-b[n-1], 0));
    for(int i = n-2; i >= 0; i--)
        suf.push_back(max(suf.back(), a[i+1].X-b[i]));
    reverse(suf.begin(), suf.end());

    // for(int i = 0; i < n; i++)
    //     printf("%d ", suf[i]);
    // printf("\n");

    vector<int> ans(n+1);
    for(int i = 0; i <= n; i++) {
        if(i == 0)
            ans[a[i].Y] = suf[i];
        else if(i == n)
            ans[a[i].Y] = pref[i-1];
        else {
            ans[a[i].Y] = max(pref[i-1], suf[i]);
            // cout << a[i].Y << " " << pref[i-1] << " " << suf[i] << "\n";
        }
    }
    for(int i = 0; i <= n; i++)
        printf("%d ", ans[i]);
    printf("\n");
    return 0;
}

Compilation message (stderr)

ho_t1.cpp: In function 'int main()':
ho_t1.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
ho_t1.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         scanf("%d", &a[i].X);
      |         ~~~~~^~~~~~~~~~~~~~~
ho_t1.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         scanf("%d", &b[i]);
      |         ~~~~~^~~~~~~~~~~~~

• Subtask 1: 1 / 1
• Subtask 2: 8 / 8
• Subtask 3: 91 / 91