Submission #122918

#	Time	Username	Problem	Language	Result	Execution time	Memory
122918		Hideo	Coin Collecting (JOI19_ho_t4)	C++14	0 / 100	2 ms	376 KiB

joi2019_ho_t4

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

#define ll long long
#define pb push_back
#define mk make_pair
#define fr first
#define sc second
#define vi vector < int >
#define vl vector < ll >
#define pi pair < int, ll >
#define pii pair < int, pi >
#define vii vector < pi >

const int N = 3e5 + 7;
const int INF = 1e9 + 7;

int a[N][3];
int n, ans;

void close (int &v, int r){
    if (v < 1){
        ans += abs(1 - v);
        v = 1;
    }
    if (v > r){
        ans += abs(r - v);
        v = r;
    }
}

main(){
    cin >> n;
    int x, y;
    for (int i = 1; i <= 2 * n; i++){
        scanf("%d%d", &x, &y);
        close(x, n);
        close(y, 2);
        a[x][y]++;
    }
    for (int i = 1; i <= n; i++){
        if (min(a[i][1], a[i][2]) <= 0 && max(a[i][1], a[i][2]) > 0){
            ans += abs(min(a[i][1], a[i][2]));
            if (a[i][1] < a[i][2]){
                a[i][2] -= abs(a[i][1]);
                a[i][1] = 1;
            }
            else {
                a[i][1] -= abs(a[i][2]);
                a[i][2] = 1;
            }
        }
        a[i][1]--; a[i][2]--;
        ans += a[i][1] + a[i][2];
        a[i + 1][1] += a[i][1];
        a[i + 1][2] += a[i][2];
    }
    cout << ans;
}

Compilation message (stderr)

joi2019_ho_t4.cpp:32:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x, &y);
         ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63