#include <cstdio>
#include <vector>
using namespace std;
int p[1000005][2], f[1000005][2], n, MOD = 1000000007, mi, ma;
int main(){
scanf("%d",&n);
f[0][1] = 1;
for (int i = 1; i <= n; i++){
scanf("%d%d",&p[i][0],&p[i][1]);
f[i][0] = -1;
}
for (int i = 1; i <= n; i++){
mi = p[i][0], ma = p[i][1];
for (int j = i-1; j >= 0; j--){
if ( i-j > ma ){
break;
}
else if (( f[j][0] != -1 ) && ( mi <= i-j ) && (i-j <= ma)){
if ( f[j][0] + 1 > f[i][0] ){
f[i][0] = f[j][0] + 1;
f[i][1] = f[j][1];
}
else if ( f[j][0] + 1 == f[i][0] ){
f[i][1] = ( f[i][1] + f[j][1] ) % MOD;
}
}
mi = max( mi, p[j][0] );
ma = min( ma, p[j][1] );
}
}
if (f[ n ][ 0 ] == -1){
printf("NIE\n");
}
else {
printf("%d %d\n", f[ n ][ 0 ], f[ n ][ 1 ]);
}
}
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 | #include <cstdio> #include <vector> using namespace std; int p[1000005][2], f[1000005][2], n, MOD = 1000000007, mi, ma; int main(){ scanf("%d",&n); f[0][1] = 1; for (int i = 1; i <= n; i++){ scanf("%d%d",&p[i][0],&p[i][1]); f[i][0] = -1; } for (int i = 1; i <= n; i++){ mi = p[i][0], ma = p[i][1]; for (int j = i-1; j >= 0; j--){ if ( i-j > ma ){ break; } else if (( f[j][0] != -1 ) && ( mi <= i-j ) && (i-j <= ma)){ if ( f[j][0] + 1 > f[i][0] ){ f[i][0] = f[j][0] + 1; f[i][1] = f[j][1]; } else if ( f[j][0] + 1 == f[i][0] ){ f[i][1] = ( f[i][1] + f[j][1] ) % MOD; } } mi = max( mi, p[j][0] ); ma = min( ma, p[j][1] ); } } if (f[ n ][ 0 ] == -1){ printf("NIE\n"); } else { printf("%d %d\n", f[ n ][ 0 ], f[ n ][ 1 ]); } } |
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