Submission #1079030

#	Time	Username	Problem	Language	Result	Execution time	Memory
1079030		anton	Tiles (BOI24_tiles)	C++17	0 / 100	100 ms	6844 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;
vector<pt> points; 
signed main(){
    cin>>N>>M;
    int min_y = 1e18, max_y= -1e18;

    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 k =-1;
    bool ok = true;
    while(ok && k<=M-3){

        for(int i = 0; i<col_range[k+1].size(); i+=2){
            if((col_range[k+1][i+1]-col_range[k+1][i])%2 != 0){
                ok = false;
            }
        }
        if(col_range[k+1] != col_range[k+2]){
            ok = false;
        }
        if(ok){
            k+=2;
        }
    }
    cout<<k+1<<endl;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:41:25: 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]
   41 |         for(int i = 0; i<col_range[k+1].size(); i+=2){
      |                        ~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:11:9: warning: unused variable 'min_y' [-Wunused-variable]
   11 |     int min_y = 1e18, max_y= -1e18;
      |         ^~~~~
Main.cpp:11:23: warning: unused variable 'max_y' [-Wunused-variable]
   11 |     int min_y = 1e18, max_y= -1e18;
      |                       ^~~~~

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