#include <cstdio>
#include <vector>
#include <map>
#include <algorithm>
#include <set>
#include <deque>
#define REP(i, n) for (int i = 0; i < (n); ++i)
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
using namespace std;
const int MAX_N = 1000100;
const long long MOD = 1000000007;
int n;
int dmax[MAX_N], dmin[MAX_N];
long long d[MAX_N];
int num_teams[MAX_N];
int stop[MAX_N];
int main() {
scanf("%d", &n);
REP(i, n) scanf("%d %d", &dmin[i], &dmax[i]);
REP(i, n) d[i] = 0;
REP(i, n) num_teams[i] = -1;
REP(i, n) stop[i] = 0;
d[MAX_N-1] = 1;
num_teams[MAX_N-1] = 0;
// (kiedy_wypada, pozycja)
set<pair<int, int> > maxy;
REP(end, n) {
// SLOW SLOW SLOW
int need = 0;
int need_max = MAX_N;
int limit = 0;
for (int i = end; i >= limit; i--) {
need = max(need, dmin[i]);
need_max = min(need_max, dmax[i]);
if (need_max < end - i + 1) break;
if (need <= end - i + 1) {
int idx = (i == 0 ? (MAX_N-1) : (i-1));
if (num_teams[idx] == -1) {
// pass
} else if (num_teams[idx] + 1 > num_teams[end]) {
num_teams[end] = num_teams[idx] + 1;
d[end] = d[idx];
limit = stop[num_teams[end]-1];
} else if (num_teams[idx] + 1 == num_teams[end]) {
d[end] += d[idx];
}
}
}
d[end] %= MOD;
stop[num_teams[end]] = min(stop[num_teams[end]], end);
}
if (num_teams[n-1] == -1) {
printf("NIE\n");
} else {
printf("%d %lld\n", num_teams[n-1], d[n-1] % MOD);
}
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | #include <cstdio> #include <vector> #include <map> #include <algorithm> #include <set> #include <deque> #define REP(i, n) for (int i = 0; i < (n); ++i) #define FOR(i, a, b) for (int i = (a); i < (b); ++i) using namespace std; const int MAX_N = 1000100; const long long MOD = 1000000007; int n; int dmax[MAX_N], dmin[MAX_N]; long long d[MAX_N]; int num_teams[MAX_N]; int stop[MAX_N]; int main() { scanf("%d", &n); REP(i, n) scanf("%d %d", &dmin[i], &dmax[i]); REP(i, n) d[i] = 0; REP(i, n) num_teams[i] = -1; REP(i, n) stop[i] = 0; d[MAX_N-1] = 1; num_teams[MAX_N-1] = 0; // (kiedy_wypada, pozycja) set<pair<int, int> > maxy; REP(end, n) { // SLOW SLOW SLOW int need = 0; int need_max = MAX_N; int limit = 0; for (int i = end; i >= limit; i--) { need = max(need, dmin[i]); need_max = min(need_max, dmax[i]); if (need_max < end - i + 1) break; if (need <= end - i + 1) { int idx = (i == 0 ? (MAX_N-1) : (i-1)); if (num_teams[idx] == -1) { // pass } else if (num_teams[idx] + 1 > num_teams[end]) { num_teams[end] = num_teams[idx] + 1; d[end] = d[idx]; limit = stop[num_teams[end]-1]; } else if (num_teams[idx] + 1 == num_teams[end]) { d[end] += d[idx]; } } } d[end] %= MOD; stop[num_teams[end]] = min(stop[num_teams[end]], end); } if (num_teams[n-1] == -1) { printf("NIE\n"); } else { printf("%d %lld\n", num_teams[n-1], d[n-1] % MOD); } return 0; } |
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