TopCoder High School SRM 42 Level one - 250 pt - Fancy GUI solution

TopCoder High School SRM 42 Level one - 250 pt - Fancy GUI statement: http://community.topcoder.com/stat?c=problem_statement&pm=7888&rd=10790

TopCoder High School SRM 42 Level one - 250 pt - Fancy GUI editorial: http://community.topcoder.com/tc?module=Static&d1=hs&d2=match_editorials&d3=hs_srm42

TopCoder High School SRM 42 Level one - 250 pt - Fancy GUI solution: 

#include <iostream>
#include <vector>

class FancyGUI{
    public: int totalDarkArea(int n, std::vector <int> x1, std::vector <int> y1, std::vector <int> x2, std::vector <int> y2) {
        int cnt=0, a[105][105]={0};
        for(int i=0; i<x1.size(); i++) for(int j=x1[i]; j<=x2[i]; j++) for(int k=y1[i]; k<=y2[i]; k++) a[j][k]++;
        for(int i=1; i<=100; i++) for(int j=1; j<=100; j++) if(a[i][j]<=n) cnt++;
        return 100*100-cnt;
    }
};