문제
풀이
#include <algorithm>
#include <iostream>
using namespace std;
bool solve(void) {
int n, H; cin >> n >> H;
long long ans = 0;
while (n--) {
int l, w, h; cin >> l >> w >> h;
int mn = 2e9;
if (l <= H) mn = min({mn, w, h});
if (w <= H) mn = min({mn, l, h});
if (h <= H) mn = min({mn, l, w});
if (mn == 2e9) return false;
else ans += mn;
}
cout << ans;
return true;
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << (solve() ? "" : "impossible");
return 0;
}