Submission #288165

#	Time	Username	Problem	Language	Result	Execution time	Memory
288165		2qbingxuan	Ideal city (IOI12_city)	C++14	0 / 100	26 ms	896 KiB

city

#include <bits/stdc++.h>
#ifdef local
#define debug(...) qqbx(#__VA_ARGS__, __VA_ARGS__)
template <typename H, typename ...T> void qqbx(const char *s, const H& h, T &&...args) {
    for(; *s && *s != ','; ++s) if(*s != ' ') std::cerr << *s;
    std::cerr << " = " << h << (sizeof...(T) ? ", " : "\n");
    if constexpr(sizeof...(T)) qqbx(++s, args...);
}
#define safe std::cerr<<__PRETTY_FUNCTION__<<" line "<<__LINE__<<" safe\n"
#else
#define debug(...) ((void)0)
#define safe ((void)0)
#endif // local
#define pb emplace_back
#define all(v) begin(v),end(v)

using namespace std;
const int MOD = 1000000000;

int calc(int L, int i, int R) {
    // return \sum_{j=L}^R abs(j-i)
    // 0 + 1 + 2 + ... + i-L +
    // 1 + 2 + ... + R-i
    return (1LL * (i-L) * (i-L+1) / 2 + 1LL * (R-i) * (R-i+1) / 2) % MOD;
}
int DistanceSum(int n, int x[], int y[]) {
    vector<pair<int,int>> v;
    vector<pair<int,int>> s;
    for(int i = 0; i < n; i++) v.pb(x[i], y[i]);
    sort(all(v));
    int lastL = 0, lastR = 1e9;
    int ans = 0, cnt = 0;
    map<int,int> sum;
    for(int i = 0, j; i < n; i = j) {
        for(j = i; j < n; j++) if(v[i].first != v[j].first) break;
        int l = v[i].second, r = v[j-1].second;
        int L = max(lastL, l), R = min(lastR, r);
        map<int,int> tmp;
        for(int i = L; i <= R; i++) {
            int s = (sum[i] + cnt) % MOD;
            tmp[i] = s;
        }
        for(int i = L-1; i >= l; i--) {
            int s = (tmp[i+1] + cnt) % MOD;
            tmp[i] = s;
        }
        for(int i = R+1; i <= r; i++) {
            int s = (tmp[i-1] + cnt) % MOD;
            tmp[i] = s;
        }
        for(int i = l; i <= r; i++) tmp[i] = (tmp[i] + calc(l, i, r)) % MOD;
        for(int i = l; i <= r; i++) ans = (ans + tmp[i]) % MOD;
        sum = tmp;
        cnt += r-l+1;
        lastL = l, lastR = r;
    }
    return ans;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 45