Submission #199842

#	Time	Username	Problem	Language	Result	Execution time	Memory
199842		human1234	Min-cost GCD (GA9_mcg)	C++14	0 / 100	162 ms	8440 KiB

mcg

#include <stdio.h>
#include <vector>

using namespace std;

using i128 = __int128;
using ll = long long;
using pll = pair<ll, ll>;
using vpll = vector<pll>;

const ll LIMIT = 1e19;

inline ll conv(i128 x) {
    if (x > (i128)LIMIT) return LIMIT;
    return (ll)x;
}

int main() {
    int t;
    vpll v;

    scanf("%d", &t);
    v.resize(300);
    while (t--) {
        ll a, b, p, q;

        scanf("%lld%lld%lld%lld", &a, &b, &p, &q);
        if (a > b) {
            v[0] = {0, -1};
        } else {
            ll t = a;

            a = b;
            b = t;
            v[0] = {p, 0};
        }

        int c = 0;

        while (a && b) {
            ll k = a / b, r = a % b;
            pll past = v[c], next;
            
            if (past.second == -1) {
                next = {conv((i128)p), conv((i128)k * (i128)q)};
            } else {
                ll f, s;

                f = min(conv((i128)past.first + (i128)p), conv((i128)past.second + (i128)k * (i128)q));
                s = min(conv((i128)past.first + (i128)k * (i128)q), conv((i128)past.second + (i128)p + (i128)k * (i128)q));

                next = {f, s};
            }

            c++;
            v[c] = next;

            a = b;
            b = r;
        }

        printf("%lld\n", min(v[c].first, v[c].second));
    }
}

Compilation message (stderr)

mcg.cpp:11:18: warning: overflow in implicit constant conversion [-Woverflow]
 const ll LIMIT = 1e19;
                  ^~~~
mcg.cpp: In function 'int main()':
mcg.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &t);
     ~~~~~^~~~~~~~~~
mcg.cpp:27:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld%lld%lld%lld", &a, &b, &p, &q);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 16
• Subtask 3: 0 / 27
• Subtask 4: 0 / 43