| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 241648 | abacaba | Robots (IOI13_robots) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <iostream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <cstring>
#include "robots.h"
#include <chrono>
#include <vector>
#include <map>
#include <random>
#include <set>
#include <algorithm>
#include <math.h>
#include <cstdio>
#include <stdio.h>
#include <queue>
#include <bitset>
#include <cstdlib>
#include <deque>
#include <cassert>
#include <stack>
using namespace std;
#define mp make_pair
#define f first
#define se second
#define pb push_back
#define ppb pop_back
#define emb emplace_back
#define ll long long
#define ull unsigned long long
#define cntbit(x) __builtin_popcount(x)
#define endl '\n'
#define uset unordered_set
#define umap unordered_map
#define pii pair<int, int>
#define ld long double
#define pll pair<long long, long long>
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
template <typename T> inline T range(T l, T r) {
return uniform_int_distribution<T>(l, r)(rng);
}
inline void setin(string s) {
freopen(s.c_str(), "r", stdin);
}
inline void setout(string s) {
freopen(s.c_str(), "w", stdout);
}
template <typename T> void Min(T &a, T b) {
a = min(a, b);
}
template <typename T> void Max(T &a, T b) {
a = max(a, b);
}
const int inf = 2e9;
const int mod = 998244353;
const int N = 1e6 + 15;
int a[N], b[N];
pii s[N];
int n, m, t;
bool used[N];
int cnt[2][N];
set <pii> is;
inline bool check(int mid) {
is.clear();
for(int i = 1; i <= n; ++i) {
cnt[0][i] = mid;
is.insert({a[i], i});
}
for(int i = 1; i <= m; ++i)
cnt[1][i] = mid;
for(int i = 1; i <= t; ++i) {
used[i] = false;
set <pii>::iterator it = is.upper_bound({s[i].se, inf});
if(it == is.end())
continue;
used[i] = true;
if(--cnt[0][it->se] == 0)
is.erase(it);
}
for(int i = 1, j = 1; i <= t; ++i) {
if(!used[i]) {
if(cnt[1][j] == 0)
++j;
if(j > m || b[j] <= s[i].f)
return false;
cnt[1][j]--;
used[i] = true;
}
}
return true;
}
int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
n = A, m = B, t = T;
for(int i = 0; i < n; ++i)
a[i + 1] = X[i];
for(int i = 0; i < m; ++i)
b[i + 1] = Y[i];
sort(a + 1, a + 1 + n, [&](int a, int b) {
return a > b;
});
sort(b + 1, b + 1 + m, [&](int a, int b) {
return a > b;
});
for(int i = 0; i < t; ++i)
s[i + 1] = {S[i], W[i]};
sort(s + 1, s + 1 + t, [&](pii a, pii b) {
return a > b;
});
int l = 1, r = t, res = -1;
while(l <= r) {
int mid = l + r >> 1;
if(check(mid))
r = mid - 1, res = mid;
else
l = mid + 1;
}
return res;
}
#define fail(s, x...) do { \
fprintf(stderr, s "\n", ## x); \
exit(1); \
} while(0)
#define MAX_A 50000
#define MAX_B 50000
#define MAX_T 500000
static int X[MAX_A];
static int Y[MAX_B];
static int W[MAX_T];
static int S[MAX_T];
int main() {
int A, B, T, i;
int res;
FILE *f = fopen("input.txt", "r");
if (!f)
fail("Failed to open input file.");
res = fscanf(f, "%d", &A);
if (res != 1)
fail("Failed to read A from input file.");
if (A < 0 || A > MAX_A)
fail("A is out of bounds.");
res = fscanf(f, "%d", &B);
if (res != 1)
fail("Failed to read B from input file.");
if (B < 0 || B > MAX_B)
fail("B is out of bounds.");
res = fscanf(f, "%d", &T);
if (res != 1)
fail("Failed to read T from input file.");
if (T < 1 || T > MAX_T)
fail("T is out of bounds.");
for (i = 0; i < A; i++) {
res = fscanf(f, "%d", &X[i]);
if (res != 1)
fail("Failed to read data from input file.");
}
for (i = 0; i < B; i++) {
res = fscanf(f, "%d", &Y[i]);
if (res != 1)
fail("Failed to read data from input file.");
}
for (i = 0; i < T; i++) {
res = fscanf(f, "%d%d", &W[i], &S[i]);
if (res != 2)
fail("Failed to read data from input file.");
}
fclose(f);
int answer = putaway(A, B, T, X, Y, W, S);
printf("%d\n", answer);
return 0;
}