Submission #943763

#	Time	Username	Problem	Language	Result	Execution time	Memory
943763		tset	Coin Collecting (JOI19_ho_t4)	C++17	100 / 100	47 ms	10400 KiB

joi2019_ho_t4

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

#define int long long

signed main()
{
    int nbLigs = 2,nbCols;
    scanf("%lld", &nbCols);
    vector<pair<int,int>> pts;
    for(int iPt =0; iPt<2*nbCols; iPt++)
    {
        int col, lig;
        scanf("%lld%lld", &col, &lig);
        pts.push_back({lig, col});
    }
    int res = 0;
    vector<vector<int> > grille(2, vector<int>(nbCols, -1));
    for(auto pt : pts)
    {
        int ligAct = pt.first;
        int colAct = pt.second;
        if(ligAct<1)
        {
            res += abs(1 - ligAct);
            ligAct = 1;
        }
        if(ligAct>2)
        {
            res += abs(2 - ligAct);
            ligAct = 2;
        }
        if(colAct<1)
        {
            res += abs(1 - colAct);
            colAct = 1;
        }
        if(colAct>nbCols)
        {
            res += abs(nbCols - colAct);
            colAct = nbCols;
        }
        ligAct--;
        colAct--;
        grille[ligAct][colAct]++;
    }

    for(int iC = 0; iC < nbCols; iC++)
    {
        if(iC >0)
        {
            grille[0][iC] += grille[0][iC-1];
            grille[1][iC] += grille[1][iC-1];
        }
        if(grille[0][iC] * grille[1][iC] < 0)
        {
            int transferable = max(grille[0][iC], grille[1][iC]);
            int needed = abs(min(grille[0][iC], grille[1][iC]));
            int transfered = min(transferable, needed);
            for(int iL=0; iL<2; iL++)
            {
                if(grille[iL][iC] < 0)
                    grille[iL][iC] += transfered;
                else
                    grille[iL][iC] -= transfered;
            }
            res += transfered;
        }

        res += abs(grille[0][iC]);
        res += abs(grille[1][iC]);
    }
    printf("%lld\n", res);
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:8:9: warning: unused variable 'nbLigs' [-Wunused-variable]
    8 |     int nbLigs = 2,nbCols;
      |         ^~~~~~
joi2019_ho_t4.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%lld", &nbCols);
      |     ~~~~~^~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         scanf("%lld%lld", &col, &lig);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 63 / 63