oj.uz

Submission #68851

# Submission time Handle Problem Language Result Execution time Memory
68851 2018-08-18T19:11:59 Z duality Bulldozer (JOI17_bulldozer) C++11
100 / 100
 1292 ms 17128 KB 
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long int LLI;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pii> vpii;
const double PI = acos(-1.0);
#define x first
#define y second

struct point { int x,y,w; };
bool comp(point a,point b) {
    if (a.y == b.y) return a.x > b.x;
    else return a.y < b.y;
}
point p[2000];
struct event { int i,j; };
vector<event> events;
LLI cross(event a,event b) {
    pii av = mp(p[a.j].x-p[a.i].x,p[a.j].y-p[a.i].y);
    pii bv = mp(p[b.j].x-p[b.i].x,p[b.j].y-p[b.i].y);
    return (LLI) av.x*bv.y-(LLI) av.y*bv.x;
}
bool comp2(event a,event b) {
    LLI c = cross(a,b);
    if (c == 0) {
        if (a.i == b.i) return a.j < b.j;
        else return a.i < b.i;
    }
    else return c > 0;
}
int arr[2000],pos[2000];
LLI sum[1 << 12],pre[1 << 12],suff[1 << 12],vec[1 << 12];
int update(int s,int e,int ai,int i,int num) {
    if ((s > ai) || (e < ai)) return 0;
    else if (s == e) {
        sum[i] = num;
        pre[i] = suff[i] = vec[i] = max(num,0);
        return 0;
    }

    int mid = (s+e) / 2;
    update(s,mid,ai,2*i+1,num);
    update(mid+1,e,ai,2*i+2,num);
    sum[i] = sum[2*i+1] + sum[2*i+2];
    pre[i] = max(pre[2*i+1],sum[2*i+1]+pre[2*i+2]);
    suff[i] = max(suff[2*i+2],sum[2*i+2]+suff[2*i+1]);
    vec[i] = max(max(vec[2*i+1],vec[2*i+2]),suff[2*i+1]+pre[2*i+2]);
    return 0;
}
int main() {
    int i;
    int N;
    scanf("%d",&N);
    for (i = 0; i < N; i++) scanf("%d %d %d",&p[i].x,&p[i].y,&p[i].w);
    sort(p,p+N,comp);

    int j;
    for (i = 0; i < N; i++) {
        for (j = i+1; j < N; j++) events.pb((event){i,j});
        arr[i] = p[i].w,pos[i] = i;
        update(0,N-1,i,0,p[i].w);
    }
    LLI ans = vec[0];
    sort(events.begin(),events.end(),comp2);
    for (i = 0; i < events.size(); i++) {
        swap(arr[pos[events[i].i]],arr[pos[events[i].j]]);
        swap(pos[events[i].i],pos[events[i].j]);
        update(0,N-1,pos[events[i].i],0,arr[pos[events[i].i]]);
        update(0,N-1,pos[events[i].j],0,arr[pos[events[i].j]]);
        if ((i == events.size()-1) || (cross(events[i],events[i+1]) != 0)) ans = max(ans,vec[0]);
    }
    printf("%lld\n",ans);

    return 0;
}

Compilation message

bulldozer.cpp: In function 'int main()':
bulldozer.cpp:68:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < events.size(); i++) {
                 ~~^~~~~~~~~~~~~~~
bulldozer.cpp:73:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if ((i == events.size()-1) || (cross(events[i],events[i+1]) != 0)) ans = max(ans,vec[0]);
              ~~^~~~~~~~~~~~~~~~~~
bulldozer.cpp:56:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&N);
     ~~~~~^~~~~~~~~
bulldozer.cpp:57:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (i = 0; i < N; i++) scanf("%d %d %d",&p[i].x,&p[i].y,&p[i].w);
                             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 3 ms 512 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 512 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 4 ms 512 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 4 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 4 ms 512 KB Output is correct
9 Correct 4 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 2 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 4 ms 512 KB Output is correct
22 Correct 4 ms 512 KB Output is correct
23 Correct 4 ms 512 KB Output is correct
24 Correct 4 ms 512 KB Output is correct
25 Correct 4 ms 512 KB Output is correct
26 Correct 4 ms 512 KB Output is correct
27 Correct 4 ms 512 KB Output is correct
28 Correct 3 ms 512 KB Output is correct
29 Correct 4 ms 512 KB Output is correct
30 Correct 4 ms 512 KB Output is correct
31 Correct 4 ms 512 KB Output is correct
32 Correct 3 ms 512 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 4 ms 512 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 4 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 4 ms 512 KB Output is correct
9 Correct 4 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 2 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 4 ms 512 KB Output is correct
22 Correct 4 ms 512 KB Output is correct
23 Correct 4 ms 512 KB Output is correct
24 Correct 4 ms 512 KB Output is correct
25 Correct 4 ms 512 KB Output is correct
26 Correct 4 ms 512 KB Output is correct
27 Correct 4 ms 512 KB Output is correct
28 Correct 3 ms 512 KB Output is correct
29 Correct 4 ms 512 KB Output is correct
30 Correct 4 ms 512 KB Output is correct
31 Correct 4 ms 512 KB Output is correct
32 Correct 3 ms 512 KB Output is correct
33 Correct 1181 ms 17000 KB Output is correct
34 Correct 1150 ms 17000 KB Output is correct
35 Correct 1161 ms 17112 KB Output is correct
36 Correct 1172 ms 17076 KB Output is correct
37 Correct 1159 ms 17068 KB Output is correct
38 Correct 1167 ms 17112 KB Output is correct
39 Correct 1182 ms 17000 KB Output is correct
40 Correct 1186 ms 17000 KB Output is correct
41 Correct 1172 ms 16976 KB Output is correct
42 Correct 1177 ms 16984 KB Output is correct
43 Correct 1157 ms 16992 KB Output is correct
44 Correct 1152 ms 17084 KB Output is correct
45 Correct 1196 ms 16984 KB Output is correct
46 Correct 1149 ms 16984 KB Output is correct
47 Correct 1142 ms 16984 KB Output is correct
48 Correct 1173 ms 16988 KB Output is correct
49 Correct 1145 ms 16992 KB Output is correct
50 Correct 1229 ms 16988 KB Output is correct
51 Correct 1172 ms 17128 KB Output is correct
52 Correct 1292 ms 16976 KB Output is correct
53 Correct 1120 ms 16992 KB Output is correct
54 Correct 1138 ms 16984 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 4 ms 512 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 4 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 4 ms 512 KB Output is correct
9 Correct 4 ms 512 KB Output is correct
10 Correct 4 ms 512 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 2 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 2 ms 384 KB Output is correct
21 Correct 4 ms 512 KB Output is correct
22 Correct 4 ms 512 KB Output is correct
23 Correct 4 ms 512 KB Output is correct
24 Correct 4 ms 512 KB Output is correct
25 Correct 4 ms 512 KB Output is correct
26 Correct 4 ms 512 KB Output is correct
27 Correct 4 ms 512 KB Output is correct
28 Correct 3 ms 512 KB Output is correct
29 Correct 4 ms 512 KB Output is correct
30 Correct 4 ms 512 KB Output is correct
31 Correct 4 ms 512 KB Output is correct
32 Correct 3 ms 512 KB Output is correct
33 Correct 1181 ms 17000 KB Output is correct
34 Correct 1150 ms 17000 KB Output is correct
35 Correct 1161 ms 17112 KB Output is correct
36 Correct 1172 ms 17076 KB Output is correct
37 Correct 1159 ms 17068 KB Output is correct
38 Correct 1167 ms 17112 KB Output is correct
39 Correct 1182 ms 17000 KB Output is correct
40 Correct 1186 ms 17000 KB Output is correct
41 Correct 1172 ms 16976 KB Output is correct
42 Correct 1177 ms 16984 KB Output is correct
43 Correct 1157 ms 16992 KB Output is correct
44 Correct 1152 ms 17084 KB Output is correct
45 Correct 1196 ms 16984 KB Output is correct
46 Correct 1149 ms 16984 KB Output is correct
47 Correct 1142 ms 16984 KB Output is correct
48 Correct 1173 ms 16988 KB Output is correct
49 Correct 1145 ms 16992 KB Output is correct
50 Correct 1229 ms 16988 KB Output is correct
51 Correct 1172 ms 17128 KB Output is correct
52 Correct 1292 ms 16976 KB Output is correct
53 Correct 1120 ms 16992 KB Output is correct
54 Correct 1138 ms 16984 KB Output is correct
55 Correct 1147 ms 17120 KB Output is correct
56 Correct 1141 ms 17000 KB Output is correct
57 Correct 1175 ms 16964 KB Output is correct
58 Correct 1191 ms 16984 KB Output is correct
59 Correct 1166 ms 16984 KB Output is correct
60 Correct 1152 ms 16984 KB Output is correct
61 Correct 1168 ms 17000 KB Output is correct
62 Correct 1131 ms 16988 KB Output is correct
63 Correct 1140 ms 17000 KB Output is correct
64 Correct 1130 ms 16992 KB Output is correct
65 Correct 1148 ms 16988 KB Output is correct
66 Correct 1139 ms 17000 KB Output is correct
67 Correct 1168 ms 16992 KB Output is correct
68 Correct 1171 ms 16992 KB Output is correct
69 Correct 1154 ms 16992 KB Output is correct
70 Correct 1135 ms 17000 KB Output is correct
71 Correct 1162 ms 16984 KB Output is correct
72 Correct 1159 ms 16984 KB Output is correct
73 Correct 1149 ms 16984 KB Output is correct
74 Correct 1160 ms 16988 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 512 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 3 ms 512 KB Output is correct
5 Correct 4 ms 512 KB Output is correct
6 Correct 3 ms 512 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 512 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 3 ms 512 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 4 ms 512 KB Output is correct
17 Correct 3 ms 512 KB Output is correct
18 Correct 3 ms 512 KB Output is correct
19 Correct 4 ms 512 KB Output is correct
20 Correct 3 ms 512 KB Output is correct
21 Correct 4 ms 512 KB Output is correct
22 Correct 3 ms 512 KB Output is correct
23 Correct 4 ms 512 KB Output is correct
24 Correct 4 ms 512 KB Output is correct
25 Correct 4 ms 512 KB Output is correct
26 Correct 2 ms 384 KB Output is correct
27 Correct 2 ms 384 KB Output is correct
28 Correct 2 ms 384 KB Output is correct
29 Correct 2 ms 384 KB Output is correct
30 Correct 2 ms 384 KB Output is correct
31 Correct 2 ms 384 KB Output is correct
32 Correct 2 ms 384 KB Output is correct
33 Correct 2 ms 384 KB Output is correct
34 Correct 2 ms 384 KB Output is correct
35 Correct 2 ms 384 KB Output is correct
36 Correct 4 ms 512 KB Output is correct
37 Correct 4 ms 512 KB Output is correct
38 Correct 4 ms 512 KB Output is correct
39 Correct 4 ms 512 KB Output is correct
40 Correct 4 ms 512 KB Output is correct
41 Correct 4 ms 512 KB Output is correct
42 Correct 4 ms 512 KB Output is correct
43 Correct 3 ms 512 KB Output is correct
44 Correct 4 ms 512 KB Output is correct
45 Correct 4 ms 512 KB Output is correct
46 Correct 4 ms 512 KB Output is correct
47 Correct 3 ms 512 KB Output is correct
48 Correct 1181 ms 17000 KB Output is correct
49 Correct 1150 ms 17000 KB Output is correct
50 Correct 1161 ms 17112 KB Output is correct
51 Correct 1172 ms 17076 KB Output is correct
52 Correct 1159 ms 17068 KB Output is correct
53 Correct 1167 ms 17112 KB Output is correct
54 Correct 1182 ms 17000 KB Output is correct
55 Correct 1186 ms 17000 KB Output is correct
56 Correct 1172 ms 16976 KB Output is correct
57 Correct 1177 ms 16984 KB Output is correct
58 Correct 1157 ms 16992 KB Output is correct
59 Correct 1152 ms 17084 KB Output is correct
60 Correct 1196 ms 16984 KB Output is correct
61 Correct 1149 ms 16984 KB Output is correct
62 Correct 1142 ms 16984 KB Output is correct
63 Correct 1173 ms 16988 KB Output is correct
64 Correct 1145 ms 16992 KB Output is correct
65 Correct 1229 ms 16988 KB Output is correct
66 Correct 1172 ms 17128 KB Output is correct
67 Correct 1292 ms 16976 KB Output is correct
68 Correct 1120 ms 16992 KB Output is correct
69 Correct 1138 ms 16984 KB Output is correct
70 Correct 1147 ms 17120 KB Output is correct
71 Correct 1141 ms 17000 KB Output is correct
72 Correct 1175 ms 16964 KB Output is correct
73 Correct 1191 ms 16984 KB Output is correct
74 Correct 1166 ms 16984 KB Output is correct
75 Correct 1152 ms 16984 KB Output is correct
76 Correct 1168 ms 17000 KB Output is correct
77 Correct 1131 ms 16988 KB Output is correct
78 Correct 1140 ms 17000 KB Output is correct
79 Correct 1130 ms 16992 KB Output is correct
80 Correct 1148 ms 16988 KB Output is correct
81 Correct 1139 ms 17000 KB Output is correct
82 Correct 1168 ms 16992 KB Output is correct
83 Correct 1171 ms 16992 KB Output is correct
84 Correct 1154 ms 16992 KB Output is correct
85 Correct 1135 ms 17000 KB Output is correct
86 Correct 1162 ms 16984 KB Output is correct
87 Correct 1159 ms 16984 KB Output is correct
88 Correct 1149 ms 16984 KB Output is correct
89 Correct 1160 ms 16988 KB Output is correct
90 Correct 1141 ms 17000 KB Output is correct
91 Correct 1126 ms 16984 KB Output is correct
92 Correct 1146 ms 16984 KB Output is correct
93 Correct 1145 ms 17000 KB Output is correct
94 Correct 1174 ms 16984 KB Output is correct
95 Correct 1158 ms 16984 KB Output is correct
96 Correct 1150 ms 16984 KB Output is correct
97 Correct 1145 ms 16988 KB Output is correct
98 Correct 1163 ms 17000 KB Output is correct
99 Correct 1185 ms 16988 KB Output is correct
100 Correct 1057 ms 17000 KB Output is correct
101 Correct 1091 ms 16984 KB Output is correct
102 Correct 1067 ms 16980 KB Output is correct
103 Correct 1048 ms 16984 KB Output is correct
104 Correct 1094 ms 17120 KB Output is correct
105 Correct 1096 ms 16984 KB Output is correct
106 Correct 1122 ms 16988 KB Output is correct
107 Correct 1079 ms 16988 KB Output is correct
108 Correct 1104 ms 17000 KB Output is correct
109 Correct 1111 ms 16988 KB Output is correct
110 Correct 1084 ms 17076 KB Output is correct
111 Correct 1073 ms 17008 KB Output is correct
112 Correct 1088 ms 17000 KB Output is correct
113 Correct 1161 ms 16988 KB Output is correct
114 Correct 1098 ms 17128 KB Output is correct
115 Correct 1079 ms 16984 KB Output is correct
116 Correct 1080 ms 16984 KB Output is correct
117 Correct 1075 ms 16988 KB Output is correct
118 Correct 1079 ms 16988 KB Output is correct
119 Correct 1089 ms 17000 KB Output is correct
120 Correct 1 ms 384 KB Output is correct
121 Correct 2 ms 384 KB Output is correct
122 Correct 1205 ms 17120 KB Output is correct
123 Correct 1145 ms 16984 KB Output is correct
124 Correct 1153 ms 17000 KB Output is correct
125 Correct 1162 ms 16988 KB Output is correct
126 Correct 1132 ms 16956 KB Output is correct
127 Correct 1137 ms 16992 KB Output is correct
128 Correct 1157 ms 16992 KB Output is correct
129 Correct 1172 ms 17060 KB Output is correct
130 Correct 1136 ms 16984 KB Output is correct
131 Correct 1162 ms 16992 KB Output is correct
132 Correct 1180 ms 16988 KB Output is correct
133 Correct 1189 ms 16988 KB Output is correct