Submission #569335

#	Time	Username	Problem	Language	Result	Execution time	Memory
569335		Valaki2	Gondola (IOI14_gondola)	C++14	75 / 100	36 ms	4596 KiB

gondola

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

#define int long long
#define pb push_back
#define mp make_pair
#define fi first
#define se second

signed valid(signed n, signed inputSeq[]) {
    set<int> nums;
    for(int i = 0; i < n; i++) {
        nums.insert(inputSeq[i]);
    }
    if(nums.size() < n) {
        return 0;
    }
    int pos = -1;
    for(int i = 0; i < n; i++) {
        if(inputSeq[i] <= n) {
            pos = i;
        }
    }
    if(pos == -1) {
        return 1;
    }
    for(int i = 0; i < pos; i++) {
        if(inputSeq[i] <= n) {
            if(pos - i != (inputSeq[pos] - inputSeq[i] + n) % n) {
                return 0;
            }
        }
    }
    return true;
}

//----------------------

signed replacement(signed n, signed gondolaSeq[], signed replacementSeq[]) {
    vector<pair<int, int> > v(n, mp(0, 0));
    for(int i = 0; i < n; i++) {
        v[i] = mp(gondolaSeq[i], i);
    }
    sort(v.begin(), v.end());
    vector<int> lab(n, 0);
    int pos = 0, val = 1;
    for(int i = 0; i < n; i++) {
        if(gondolaSeq[i] <= n) {
            pos = i;
            val = gondolaSeq[i];
        }
    }
    for(int i = pos; i < pos + n; i++) {
        lab[i % n] = val;
        val++;
        while(val > n) {
            val -= n;
        }
    }
    int last = n;
    vector<int> ans;
    for(int i = 0; i < n; i++) {
        if(v[i].fi > n) {
            for(int j = last + 1; j <= v[i].fi; j++) {
                ans.pb(lab[v[i].se]);
                lab[v[i].se] = n + ans.size();
            }
            last = v[i].fi;
        }
    }
    int l = ans.size();
    for(int i = 0; i < l; i++) {
        replacementSeq[i] = ans[i];
    }
    return l;
}

//----------------------

const int mod = 1e9 + 9;

int add(int a, int b) {
    return (a + b) % mod;
}

int subt(int a, int b) {
    return (a - b + mod) % mod;
}

int mult(int a, int b) {
    return (a * b) % mod;
}

int sq(int a) {
    return mult(a, a);
}

int power(int a, int b) {
    if(b == 0) {
        return 1;
    }
    if(b % 2 == 1) {
        return a * power(a, b - 1);
    } else {
        return sq(power(a, b / 2));
    }
}

signed countReplacement(signed n, signed inputSeq[]) {
    bool factorial = false;
    if(true) {
        set<int> nums;
        for(int i = 0; i < n; i++) {
            nums.insert(inputSeq[i]);
        }
        if(nums.size() < n) {
            return 0;
        }
        int pos = -1;
        for(int i = 0; i < n; i++) {
            if(inputSeq[i] <= n) {
                pos = i;
            }
        }
        if(pos != -1) {
            for(int i = 0; i < pos; i++) {
                if(inputSeq[i] <= n) {
                    if(pos - i != (inputSeq[pos] - inputSeq[i] + n) % n) {
                        return 0;
                    }
                }
            }
        } else {
            factorial = true;
        }
    }
    sort(inputSeq, inputSeq + n);
    int ans = 1;
    if(factorial) {
        for(int i = 1; i <= n; i++) {
            ans = mult(ans, i);
        }
    }
    for(int i = 1; i < n; i++) {
        if(inputSeq[i] > n) {
            ans = mult(ans, power(n - i, inputSeq[i] - max(n, inputSeq[i - 1]) - 1));
        }
    }
    if(inputSeq[0] > n) {
        ans = mult(ans, power(n, inputSeq[0] - n - 1));
    }
    return ans;
}

Compilation message (stderr)

gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:16:20: warning: comparison of integer expressions of different signedness: 'std::set<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   16 |     if(nums.size() < n) {
      |        ~~~~~~~~~~~~^~~
gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:117:24: warning: comparison of integer expressions of different signedness: 'std::set<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  117 |         if(nums.size() < n) {
      |            ~~~~~~~~~~~~^~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 20 / 20
• Subtask 7: 5 / 5
• Subtask 8: 15 / 15
• Subtask 9: 0 / 15
• Subtask 10: 0 / 10