Submission #319923

#	Time	Username	Problem	Language	Result	Execution time	Memory
319923		wildturtle	Gondola (IOI14_gondola)	C++14	90 / 100	30 ms	2528 KiB

gondola

#include "gondola.h"
#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,i,e,f,g,m,k,l,idx,mod,B[500005],pas;
long long xarisxad(long long base,long long power) {
    long long result=1;
    while(power>0) {
        if(power%2==1) result=(result*base)%mod;
        base=(base*base)%mod;
        power/=2;
    }
    return result;
}
int valid(int n,int A[]) {
    idx=-1;
    for(int i=0;i<n;i++) {
        if(A[i]<=n) { idx=i; break; }
    }
    if(idx==-1) return 1;
    a=A[idx];
    for(int i=idx;i<n;i++) {
        if(A[i]>n)  { a++; a%=(n+1); if(a==0) a++; continue; }
        if(A[i]!=a) return 0;
        a++;
        a%=(n+1);
        if(a==0) a++; 
    }
    for(int i=0;i<idx;i++) {
        if(A[i]>n)  { a++; a%=(n+1); if(a==0) a++; continue; }
        if(A[i]!=a) return 0;
        a++;
        a%=(n+1);
        if(a==0) a++;
    }
    return 1;
}
int replacement(int n,int A[],int ans[]) {
    idx=-1;
    for(int i=0;i<n;i++) {
        if(A[i]<=n) { idx=i; break; }
    }
    a=A[idx];
    for(int i=idx;i<n;i++) {
        B[i]=a;
        a++;
        a%=(n+1);
        if(a==0) a++; 
    }
    for(int i=0;i<idx;i++) {
        B[i]=a;
        a++;
        a%=(n+1);
        if(a==0) a++; 
    }
    vector < pair < int , int > > v;
    for(int i=0;i<n;i++) {
        if(A[i]>n) v.push_back({A[i],i});
    }
    sort(v.begin(),v.end());
    k=n;
    for(int i=0;i<v.size();i++) {
        while(B[v[i].second]<A[v[i].second]) {
            ans[pas]=B[v[i].second];
            pas++;
            k++;
            B[v[i].second]=k;
        }
    }
    return pas;
}
int countReplacement(int n,int A[]) {
    if(valid(n, A)==0) return 0;
    vector <int> v;
    v.push_back(n);
    for(int i=0;i<n;i++) {
        if(A[i]>n) v.push_back(A[i]);
    }
    sort(v.begin(),v.end());
    long long ans1=1;
    mod=1000000009;
    for(int i=0;i<v.size()-1;i++) {
        ans1*=xarisxad(v.size()-i-1,v[i+1]-v[i]-1);
        ans1%=mod;
    }
    if(v.size()==n+1) { ans1*=n; ans1%=mod; }
    return ans1;
}

Compilation message (stderr)

gondola.cpp: In function 'int replacement(int, int*, int*)':
gondola.cpp:61:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for(int i=0;i<v.size();i++) {
      |                 ~^~~~~~~~~
gondola.cpp: In function 'int countReplacement(int, int*)':
gondola.cpp:81:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |     for(int i=0;i<v.size()-1;i++) {
      |                 ~^~~~~~~~~~~
gondola.cpp:85:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   85 |     if(v.size()==n+1) { ans1*=n; ans1%=mod; }
      |        ~~~~~~~~^~~~~

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