Submission #680600

#	Time	Username	Problem	Language	Result	Execution time	Memory
680600		Nahian9696	Gondola (IOI14_gondola)	C++17	75 / 100	38 ms	5088 KiB

gondola

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

#define f0(i, n) for (int i = 0; i < n; i++)
#define f1(i, n) for (int i = 1; i <= n; i++)

const long long mod = 1e9 + 9;


long long powMod(long long a, long long b) {
    long long res = 1;
    while(b) {
        if(b & 1) res = (res * a) % mod;
        a = (a * a) % mod;
        b >>= 1;
    }
    return res;
}



int valid(int n, int inputSeq[]) {
    set<int> s;
    f0(i, n) {
        s.insert(inputSeq[i]);
    }
    if(s.size() != n) return 0;

    f0(i, n) {
        if(inputSeq[i] <= n) {
            f0(j, n) {
                if(inputSeq[(i+j)%n] <= n) {
                    if((inputSeq[(i+j)%n] - inputSeq[i] + n) % n != j)
                        return 0;
                }
            }
            break;
        }
    }
    return 1;
    return -1;
}

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

int replacement(int n, int gondolaSeq[], int replacementSeq[]) {
    int mx = -1;
    f0(i, n) mx = max(mx, gondolaSeq[i]);
    bool used[mx + 1] = {false};
    f0(i, n) used[gondolaSeq[i]] = true;

    int l = mx - n;
    f0(i, l) replacementSeq[i] = -1;
    int delta = 0;
    f0(i, n) {
        if(gondolaSeq[i] <= n) {
            delta = (gondolaSeq[i] - i - 1 + n) % n;
            break;
        }
    }

    f0(i, n) {
        if(gondolaSeq[i] > n) {
            if(gondolaSeq[i] == mx) {
                int ind = l-1;
                for(int j = mx; j > n; j--) {
                    if(!used[j]) {
                        replacementSeq[ind] = j;
                        ind = j - n - 1;
                    }
                }
                replacementSeq[ind] = (i + delta) % n + 1;
            } else {
                replacementSeq[gondolaSeq[i] - n - 1] = (i + delta) % n + 1;
            }
        }
    }


    return l;
    return -2;
}

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

int countReplacement(int n, int inputSeq[]) {
    int val = valid(n, inputSeq);
    if(val == 0) return 0;

    long long res = 1;
    long long bigCnt = 0, mx = 0;
    f0(i, n) {
        if(inputSeq[i] > n) {
            bigCnt++;
        }
        mx = max(mx, (long long)inputSeq[i]);
    }

    bool used[mx + 1] = {false};
    f0(i, n) used[inputSeq[i]] = true;
    int cnt = 0;
    for(int i = n+1; i <= mx; i++) {
        if(!used[i]) cnt++;
        else {
            res = (res * powMod(bigCnt, cnt)) % mod;
            cnt = 0;
            bigCnt--;
        }
    }

    return res;
    return -3;
}

Compilation message (stderr)

gondola.cpp: In function 'int valid(int, int*)':
gondola.cpp:28:17: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |     if(s.size() != n) return 0;
      |        ~~~~~~~~~^~~~

• 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