Submission #39081

#	Time	Username	Problem	Language	Result	Execution time	Memory
39081		14kg	Ideal city (IOI12_city)	C++11	23 / 100	29 ms	2680 KiB

city

#define MOD 1000000000
#define INF 2147483646
#define min2(x,y) (x<y?x:y)

int n;
int cnt_X[100001], cnt_Y[100001];

int DistanceSum(int _n, int *X, int *Y) {
	n = _n;

	int x_min=INF, y_min=INF;
	long long out = 0, t1 = 0, t2 = 0, t3;
	for (int i = 0; i < n; i++) x_min = min2(x_min, X[i]), y_min = min2(y_min, Y[i]);
	for (int i = 0; i < n; i++) cnt_X[X[i] - x_min]++, cnt_Y[Y[i] - y_min]++;
	for (int i = 0; i < n; i++) {
		out += t2*(long long)cnt_X[i], out %= MOD;
		t1 += cnt_X[i];
		t2 += t1;
	}
	t1 = t2 = 0;
	for (int i = 0; i < n; i++) {
		out += t2*(long long)cnt_Y[i], out %= MOD;
		t1 += cnt_Y[i];
		t2 += t1;
	}


	return (int)out;
}

Compilation message (stderr)

city.cpp: In function 'int DistanceSum(int, int*, int*)':
city.cpp:12:37: warning: unused variable 't3' [-Wunused-variable]
  long long out = 0, t1 = 0, t2 = 0, t3;
                                     ^

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