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Submission #103353

# Submission time Handle Problem Language Result Execution time Memory
103353 2019-03-29T23:18:06 Z tincamatei Examination (JOI19_examination) C++14
2 / 100
 3000 ms 213004 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_N = 100000;
const int MAX_Q = 100000;
const int MAX_AIB = MAX_N + MAX_Q;
const int INF = 1000000001;

struct Student {
	int t, s;
} v[MAX_N];

struct Query {
	int a, b, c;
	int *rez;
} query[MAX_Q];

int rez[MAX_Q];

bool cmp1(Student a, Student b) {
	return a.t + a.s > b.t + b.s;
}

bool cmp2(Query a, Query b) {
	return a.c > b.c;
}

map<int, map<int, int> > aib;

static inline int lsb(int x) {
	return x & (-x);
}

void updateAib(int i, int j) {
	while(i <= INF) {
		int jc = j;
		while(jc <= INF) {
			aib[i][jc]++;
			jc += lsb(jc);
		}
		i += lsb(i);
	}
}

int queryAib(int i, int j) {
	int rez = 0;
	while(i > 0) {
		int jc = j;
		while(jc > 0) {
			rez += aib[i][jc];
			jc -= lsb(jc);
		}
		i -= lsb(i);
	}
	return rez;
}

void updatePoint(int a, int b) {
	updateAib(INF - a, INF - b);
}

int queryRectangle(int a, int b) {
	return queryAib(INF - a, INF - b);
}

int main() {
#ifdef HOME
	FILE *fin = fopen("input.in", "r");
	FILE *fout = fopen("output.out", "w");
#else
	FILE *fin = stdin;
	FILE *fout = stdout;
#endif

	int n, q;
	fscanf(fin, "%d%d", &n, &q);
	for(int i = 0; i < n; ++i)
		fscanf(fin, "%d%d", &v[i].t, &v[i].s);
	for(int i = 0; i < q; ++i) {
		fscanf(fin, "%d%d%d", &query[i].a, &query[i].b, &query[i].c);
		query[i].rez = &rez[i];
	}

	sort(v, v + n, cmp1);
	sort(query, query + q, cmp2);
	
	int lastup = 0;
	for(int i = 0; i < q; ++i) {
		while(lastup < n && v[lastup].t + v[lastup].s >= query[i].c) {
			updatePoint(v[lastup].t, v[lastup].s);
			++lastup;
		}

		*query[i].rez = queryRectangle(query[i].a, query[i].b);
	}
	
	for(int i = 0; i < q; ++i)
		fprintf(fout, "%d\n", rez[i]);

	fclose(fin);
	fclose(fout);
	return 0;
}

Compilation message

examination.cpp: In function 'int main()':
examination.cpp:77:8: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  fscanf(fin, "%d%d", &n, &q);
  ~~~~~~^~~~~~~~~~~~~~~~~~~~~
examination.cpp:79:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   fscanf(fin, "%d%d", &v[i].t, &v[i].s);
   ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:81:9: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   fscanf(fin, "%d%d%d", &query[i].a, &query[i].b, &query[i].c);
   ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 356 KB Output is correct
4 Correct 3 ms 512 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 3 ms 640 KB Output is correct
7 Correct 338 ms 64604 KB Output is correct
8 Correct 359 ms 63992 KB Output is correct
9 Correct 357 ms 64504 KB Output is correct
10 Correct 167 ms 34680 KB Output is correct
11 Correct 341 ms 29688 KB Output is correct
12 Correct 42 ms 512 KB Output is correct
13 Correct 388 ms 64348 KB Output is correct
14 Correct 359 ms 64248 KB Output is correct
15 Correct 348 ms 64504 KB Output is correct
16 Correct 165 ms 20216 KB Output is correct
17 Correct 113 ms 25368 KB Output is correct
18 Correct 33 ms 512 KB Output is correct

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3027 ms 213004 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3027 ms 213004 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 356 KB Output is correct
4 Correct 3 ms 512 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 3 ms 640 KB Output is correct
7 Correct 338 ms 64604 KB Output is correct
8 Correct 359 ms 63992 KB Output is correct
9 Correct 357 ms 64504 KB Output is correct
10 Correct 167 ms 34680 KB Output is correct
11 Correct 341 ms 29688 KB Output is correct
12 Correct 42 ms 512 KB Output is correct
13 Correct 388 ms 64348 KB Output is correct
14 Correct 359 ms 64248 KB Output is correct
15 Correct 348 ms 64504 KB Output is correct
16 Correct 165 ms 20216 KB Output is correct
17 Correct 113 ms 25368 KB Output is correct
18 Correct 33 ms 512 KB Output is correct
19 Execution timed out 3027 ms 213004 KB Time limit exceeded
20 Halted 0 ms 0 KB -