Submission #81493

#	Time	Username	Problem	Language	Result	Execution time	Memory
81493		luckyboy	Automobil (COCI17_automobil)	C++14	100 / 100	7 ms	636 KiB

automobil

/**Lucky Boy**/
#include <bits/stdc++.h>
#define FOR(i, a, b) for (int i = (a); i <= (b); ++i)
#define FORD(i, a, b) for (int i = (a); i >= (b); --i)
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define maxc 1000000007
#define maxn 100005
#define maxm 500005
#define pii pair <long long,long long>
#define Task "Automobil"
template <typename T> inline void read(T &x){char c;bool nega=0;while((!isdigit(c=getchar()))&&(c!='-'));if(c=='-'){nega=1;c=getchar();}x=c-48;while(isdigit(c=getchar())) x=x*10+c-48;if(nega) x=-x;}
template <typename T> inline void writep(T x){if(x>9) writep(x/10);putchar(x%10+48);}
template <typename T> inline void write(T x){if(x<0){putchar('-');x=-x;}writep(x);putchar(' ');}
template <typename T> inline void writeln(T x){write(x);putchar('\n');}
using namespace std;
long long ans,n,m,q,ta,tb;
pii a[1003],b[1003];
void Recode(pii x[],long long &sz)
{
    sort(x+1,x+sz+1);
    long long cnt = 0;
    FOR(i,1,sz)
    {
        long long cur = 1,r = i;
        while (r <= sz && x[r].F == x[i].F)
        {
            cur = (1ll*cur*x[r].S) % maxc;
            ++r;
        }
        x[++cnt] = mp(x[i].F,cur);
        i = r - 1;
    }
    sz = cnt;
}
long long Get(long long l,long long r,long long dis)
{
    long long res;
    long long ssh = (r - l) / dis + 1;
    if (ssh % 2 == 1)
    {
        res = ((l+r) / 2) % maxc;
        ssh %= maxc;
        res = res * ssh % maxc;
    }
    else
    {
        res = (ssh / 2) % maxc;
        res %= maxc;
        r = (l + r) % maxc;
        res = res * r % maxc;
    }
    return res;
}
int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    //freopen(Task".inp", "r",stdin);
    //freopen(Task".out", "w",stdout);
    cin >> n >> m >> q;
    FOR(i,1,q)
    {
        char c;
        long long x,y;
        cin >> c >> x >> y;
        if (c == 'R') a[++ta] = mp(x,y);
        else b[++tb] = mp(x,y);
    }
    Recode(a,ta);
    Recode(b,tb);
    ans = Get(1,n*m,1);
    FOR(i,1,ta)
    {
        long long sum = Get(1ll*m*a[i].F - m + 1,1ll*m*a[i].F,1);
        ans = (ans - sum + maxc) % maxc;
        sum = (sum * a[i].S) % maxc;
        ans = (ans + sum) % maxc;
    }
    FOR(i,1,tb)
    {
        long long sum = Get(b[i].F,b[i].F + 1ll*(n-1)*m,m);
        ans = (ans - sum + maxc) % maxc;
        sum = (sum * b[i].S) % maxc;
        ans = (ans + sum) % maxc;
    }
    FOR(i,1,ta)
        FOR(j,1,tb)
        {
            long long u = a[i].F,v = b[j].F;
            long long old = (1ll*(u-1)*m + v) % maxc;
            long long ne = (old * b[j].S) % maxc;
            ans = (ans - ne + old + maxc) % maxc;
            old = (old * a[i].S) % maxc;
            ne = (old * b[j].S) % maxc;
            ans = (ans - old + ne + maxc) % maxc;
        }
    cout << ans;
    return 0;
}

• Subtask 1: 100 / 100