Submission #988070

#	Time	Username	Problem	Language	Result	Execution time	Memory
988070		wood	Seats (IOI18_seats)	C++17	17 / 100	4046 ms	56512 KiB

seats

#include "seats.h"
#include <bits/stdc++.h>  
using namespace std;
 
typedef long long ll;
typedef pair<int,int> p32;
typedef pair<ll,ll> p64;
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define vi vector<int>
#define vp32 vector<p32>
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define MOD %1000000007
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template <class T>
using Tree =
    tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//never guess
//never debug without reviewing code
//never try adding ones or substracting them
//only step by step debug when necessay

namespace potato{
    int H,W; vi R,C;
}
vector<bool> res;
int ressum = 1;
vi rmin,rmax,cmin,cmax;

void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
    potato::H = H, potato::W = W, potato::R = R, potato::C = C;
    int n = H*W;
    res.resize(n);
    rmin.resize(n); rmax.resize(n);  cmin.resize(n); cmax.resize(n);
    rmin[0] = R[0], rmax[0] = R[0], cmin[0] = C[0], cmax[0] = C[0];
    for (size_t i = 1; i < H*W; i++)
    {
        rmin[i] = min(rmin[i-1],R[i]); rmax[i] = max(rmax[i-1],R[i]);
        cmin[i] = min(cmin[i-1],C[i]); cmax[i] = max(cmax[i-1],C[i]);
        if(i+1==(rmax[i]-rmin[i]+1)*(cmax[i]-cmin[i]+1)){
            ressum++;
            res[i] = true;;
        }
    }
}

int swap_seats(int a, int b) {
    using namespace potato;
    swap(R[a],R[b]); swap(C[a],C[b]);
    if(a>b) swap(a,b);
    rmin[0] = R[0], rmax[0] = R[0], cmin[0] = C[0], cmax[0] = C[0];
    for(int i = max(a,1); i<b; i++){
        if(res[i]) ressum--;
        res[i] = false;
        rmin[i] = min(rmin[i-1],R[i]); rmax[i] = max(rmax[i-1],R[i]);
        cmin[i] = min(cmin[i-1],C[i]); cmax[i] = max(cmax[i-1],C[i]);
        if(i+1==(rmax[i]-rmin[i]+1)*(cmax[i]-cmin[i]+1)){
            ressum++;
            res[i] = true;
        }
    }
    return ressum;
}
// int main(int argc, char const *argv[])
// {
//     give_initial_chart(1,3,{0,0,0},{0,1,2});
//     cout<<swap_seats(1,2)<<'\n';
//     cout<<swap_seats(1,2)<<'\n';
//     return 0;
// }

Compilation message (stderr)

seats.cpp: In function 'void give_initial_chart(int, int, std::vector<int>, std::vector<int>)':
seats.cpp:39:26: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   39 |     for (size_t i = 1; i < H*W; i++)
      |                        ~~^~~~~
seats.cpp:43:15: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} [-Wsign-compare]
   43 |         if(i+1==(rmax[i]-rmin[i]+1)*(cmax[i]-cmin[i]+1)){
      |            ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 6 / 6
• Subtask 3: 0 / 20
• Subtask 4: 6 / 6
• Subtask 5: 0 / 33
• Subtask 6: 0 / 30