Submission #1011233

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011233		Cookie	Carnival Tickets (IOI20_tickets)	C++14	100 / 100	596 ms	114604 KiB

tickets

#include<bits/stdc++.h>
#include<fstream>
using namespace std;
#define sz(a) (int)a.size()
#define ALL(v) v.begin(), v.end()
#define ALLR(v) v.rbegin(), v.rend()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#define mpp make_pair
const ld PI = 3.14159265359, prec = 1e-9;;
//using u128 = __uint128_t;
const int cox[4] = {1, 0, -1, 0};
#include <vector>

const int coy[4] = {0, -1, 0, 1};
const ll mod = 1e9 + 7, pr = 31;
const int mxn = 1505, mxd = 250 * 250, sq = 100, mxv = 5e4 + 1;
//const int base = (1 <<18);
const ll inf = 1e9 + 5, neg = -69420, inf2 = 1e14;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
// have fun!


#include "tickets.h"
/*
#include <cassert>
#include <cstdio>
#include <vector>
#include <string>

static int n;
static int m;
static int k;
static std::vector<std::vector<int>> d;
static std::vector<std::vector<int>> x;
static int called = 0;
static void check(bool cond, std::string message) {
    if (!cond) {
        printf("%s\n", message.c_str());
        exit(0);
    }
}

void allocate_tickets( std::vector<std::vector<int>> _d) {
    check(!called, "allocate_tickets called more than once");
    d = _d;
    check((int)d.size() == n, "allocate_tickets called with parameter of wrong size");
    for (int i = 0; i < n; i++) {
        check((int)d[i].size() == m, "allocate_tickets called with parameter of wrong size");
    }
    called = 1;
}
*/
int mn[mxn + 1], mx[mxn + 1];
bool seen[mxn + 1];
long long find_maximum(int k, std::vector<std::vector<int>> x) {
    int n = sz(x), m = sz(x[0]);
	vt<vt<int>>res(n, vt<int>(m, -1));
	for(int i = 0; i < n; i++){
	    mn[i] = -1; mx[i] = m;
	}
	ll ans = 0;
	vt<pll>comp;
    for(int i = 0; i < n; i++){
        for(int j = 0; j < k; j++){
            ans -= x[i][j];
            comp.pb(mpp(x[i][j] + x[i][m - (k - j)], i));
        }
        mn[i] = k - 1;
    }
    //cout << ans << ' ';
    sort(ALLR(comp));
	for(int i = 0; i < n / 2 * k; i++){
	    ans += comp[i].fi; mx[comp[i].se]--; mn[comp[i].se]--; 
	}
	
	for(int i = 0; i < k; i++){
	    vt<pii>cand;
	    for(int j = 0; j < n; j++){
	        cand.pb(mpp(mn[j], j));
	    }
	    sort(ALLR(cand));
	    for(int j = 0; j < n / 2; j++){
	        res[cand[j].se][cand[j].fi] = i; seen[cand[j].se] = 1; mn[cand[j].se]--;
	    }
	    for(int j = 0; j < n; j++){
	        if(!seen[j]){
	            res[j][mx[j]++] = i;
	        }
	    }
	    for(int j = 0; j < n; j++)seen[j] = 0;
	}
	allocate_tickets(res);
	return ans;
	
}

/*
int main() {
    assert(scanf("%d %d %d", &n, &m, &k) == 3);
    x.resize(n);
    for (int i = 0; i < n; i++) {
        x[i].resize(m);
        for (int j=0; j < m; j++) {
            assert(scanf("%d", &x[i][j]) == 1);
        }
    }
    fclose(stdin);

    long long answer = find_maximum(k, x);
    check(called, "failure to call allocate_tickets");
    printf("%lld\n", answer);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (j) printf(" ");
            printf("%d", d[i][j]);
        }
        printf("\n");
    }
    fclose(stdout);
    return 0;
}
*/

• Subtask 1: 11 / 11
• Subtask 2: 16 / 16
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 12 / 12
• Subtask 6: 23 / 23
• Subtask 7: 10 / 10