Submission #891246

#	Time	Username	Problem	Language	Result	Execution time	Memory
891246		Tien_Noob	Automobil (COCI17_automobil)	C++17	100 / 100	13 ms	8536 KiB

automobil

//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
using namespace std;
const int mod = 1e9 + 7, N = 1e6;
int r[N + 1], c[N + 1], k;
long long n, m;
vector<int> updr, updc;
long long res;
void read()
{
    cin >> n >> m >> k;
    fill(r + 1, r + n + 1, 1);
    fill(c + 1, c + m + 1, 1);
    while(k--)
    {
        char t;
        int x, y;
        cin >> t >> x >> y;
        if (t == 'R')
        {
            r[x] = (1LL * r[x] * y) % mod;
        }
        if (t == 'S')
        {
            c[x] = (1LL * c[x] * y) % mod;
        }
    }
}
void solve()
{
    for (int i = 1; i <= n; ++ i)
    {
        if (r[i] != 1)
        {
            res -= ((((i * m + (i - 1) * m + 1) * m / 2) % mod)) % mod;
            res %= mod;
            updr.push_back(i);
        }
        res += (((i * m + (i - 1) * m + 1) * m / 2) % mod) % mod;
        res %= mod;
    }
    for (int j = 1; j <= m; ++ j)
    {
        if (c[j] != 1)
        {
            updc.push_back(j);
            res -= ((((n - 1) * m + j + j) * n / 2) % mod) % mod;
            res %= mod;
        }
    }
    for (int i : updr)
    {
        res += ((((i * m + (i - 1) * m + 1) * m / 2) % mod) * r[i]) % mod;
        res %= mod;
    }
    for (int j : updc)
    {
        res += ((((n - 1) * m + j + j) * n / 2) % mod * c[j]) % mod;
    }
    for (int i : updr)
    {
        for (int j : updc)
        {
            long long cur = ((i - 1) * m + j) % mod;
            res += cur;
            res -= (cur * r[i]) % mod;
            res -= (cur * c[j]) % mod;
            res += ((cur * r[i]) % mod * c[j]) % mod;
            res %= mod;
        }
    }
    cout << (res + mod) % mod;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message (stderr)

automobil.cpp: In function 'int main()':
automobil.cpp:82:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100