Submission #1079116

#	Time	Username	Problem	Language	Result	Execution time	Memory
1079116		anton	Tiles (BOI24_tiles)	C++17	19 / 100	67 ms	8620 KiB

Main

#include<bits/stdc++.h>
    
using namespace std;
#define int long long
#define pt complex<int>
#define pii pair<int, int>
int N, M;
const int MAX_N = 1001;
vector<pt> points;
char cont[MAX_N][MAX_N];
signed main(){
    cin>>N>>M;


    
    vector<vector<int>> col_range(M);
    for(int i = 0; i<N; i++){
        int a, b;
        cin>>a>>b;
        points.push_back({a, b});
    }
    
    pt prev= points.back();
    for(int i = 0; i<N; i++){
        pt edge = points[i]-prev;
    
        if(edge.imag() == 0){
            pii range = {min(points[i].real(), prev.real()), max(points[i].real(), prev.real())};
            for(int j = range.first; j<range.second; j++){
                col_range[j].push_back(points[i].imag());
            }
        }
        prev=  points[i];
    }
    
    for(int i = 0; i<M; i++){
        sort(col_range[i].begin(), col_range[i].end());
        int line_id = 0;
        for(int j = 0; j<MAX_N; j++){
            while(line_id<col_range[i].size() && col_range[i][line_id]<=j){
                line_id++;
            }
            if(line_id%2 == 0){
                cont[i][j] = '.';
            }
            else{
                cont[i][j] = '#';
            }
            //cout<<cont[i][j]<<" ";
        }
        //cout<<endl;
    }
    
    for(int i = 0; i<M; i++){
        for(int j = 0; j<MAX_N; j++){
            if(cont[i][j]=='#' && cont[i+1][j]=='#' && cont[i][j+1]=='#' && cont[i+1][j+1]=='#'){
                cont[i][j] = ',';
                cont[i+1][j] = '.';
                cont[i][j+1] = ',';
                cont[i+1][j+1] = '.';
            }
            //cout<<cont[i][j]<<" ";
        }
        //cout<<endl;
    }

    int k =0;
    bool no_left = false;
    for(int i = 0; i<M; i++){
        bool all_points = true;
        for(int j = 0; j<MAX_N; j++){
            all_points &= cont[i][j] == '.';
            no_left |= cont[i][j] == '#';
        }
        if(all_points && !no_left){
            k = max(k, i+1);
        }
    }
    cout<<k<<endl;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:40:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |             while(line_id<col_range[i].size() && col_range[i][line_id]<=j){
      |                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 9
• Subtask 3: 0 / 11
• Subtask 4: 19 / 19
• Subtask 5: 0 / 22
• Subtask 6: 0 / 25
• Subtask 7: 0 / 10