Submission #67002275

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Source Code Expand

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

typedef unsigned uint;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii> vpii;
typedef complex<double> cpx;
template <typename T> using minPq = priority_queue<T, vector<T>, greater<T>>;
#define ms(a, x) memset(a, x, sizeof(a))
#define pb push_back
#define fs first
#define sn second
#define ALL(v) begin(v), end(v)
#define SZ(v) ((int) (v).size())
#define lbv(v, x) (lower_bound(ALL(v), x) - (v).begin())
#define ubv(v, x) (upper_bound(ALL(v), x) - (v).begin())
template <typename T> inline void UNIQUE(vector<T> &v){sort(ALL(v)); v.resize(unique(ALL(v)) - v.begin());}
const int INF = 0x3f3f3f3f;
const ll LLINF = 0x3f3f3f3f3f3f3f3f;
const double PI = acos(-1);
#define FR(i, n) for(int i = 0; i < (n); i++)
#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define FORR(i, a, b) for(int i = (a); i >= (b); i--)
#define dbg(x) {cerr << #x << ' ' << x << endl;}
#define dbgArr(arr, n) {cerr << #arr; FR(_i, n) cerr << ' ' << (arr)[_i]; cerr << endl;}
template <typename T, typename U>
ostream& operator<<(ostream &os, pair<T, U> p){return os << "(" << p.fs << ", " << p.sn << ")";}

int main(){
    cin.sync_with_stdio(0); cin.tie(0);
    int t; cin >> t;
    while(t--){
        int n; cin >> n;
        ll f1 = 0, f2 = 0, ch = 0;
        FR(i, n){
            int a, b, c;
            cin >> a >> b >> c;
            int cf1 = max(0, min(a, b-c));
            int cf2 = max(0, min(c, b-a));
            f1 += cf1;
            f2 += cf2;
            ch += max(0, min(b-cf1-cf2, a-cf1));
        }
        // cerr << f1 << ' ' << f2 << ' ' << ch << endl;
        if(f1 < f2){
            ll d = min(f2-f1, ch);
            f1 += d;
            ch -= d;
        }
        if(f2 < f1){
            ll d = min(f1-f2, ch);
            f2 += d;
            ch -= d;
        }
        cout << min(f1, f2) + ch/2 << '\n';
    }
}

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