Submission #577939

#	Time	Username	Problem	Language	Result	Execution time	Memory
577939		MohamedFaresNebili	A Game with Grundy (CCO20_day1problem1)	C++14	25 / 25	265 ms	6984 KiB

Main

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

double inters(double a, double b, double y){
    double p = (y-b)/(double)a;
    return p;
}

int main() {
    long long count0[100005];
    memset(count0,0,sizeof count0);
    int n, l, r, y;
    cin >> n >> l >> r >> y;
    vector<pair<double,int>> pnts;
    for(int i = 0;i<n;i++){
        int x, v, h;
        cin >> x >> v >> h;
        double a = v/(double)h;
        double b = -a*x;
        pnts.push_back({inters(a,b,y),-1});
        pnts.push_back({inters(-a,-b,y),1});
    }

    for(int i = 0;i<pnts.size();i++){
        if(pnts[i].second == 1)pnts[i].first += 10e-6;
        else pnts[i].first -= 10e-6;
    }

    sort(pnts.begin(), pnts.end());
    int left = l, c = 0;
    for(int i = 0; i < pnts.size(); i++){
        if(pnts[i].first > r)break;
        if(pnts[i].first < l){
            if(pnts[i].second == 1)
                c++;
            else
                c--;
            continue;
        }
        count0[c] += ceil(pnts[i].first) - left;
        if(pnts[i].second == 1)
            c++;
        else
            c--;
        left = ceil(pnts[i].first);
    }
    count0[c] += r -  left + 1;
    for(int i = 0; i <= n; i++){
        if(i != 0)
            count0[i] += count0[i-1];
        cout << count0[i] << endl;
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i = 0;i<pnts.size();i++){
      |                   ~^~~~~~~~~~~~
Main.cpp:31:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for(int i = 0; i < pnts.size(); i++){
      |                    ~~^~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 10 / 10