Submission #35002

#	Time	Username	Problem	Language	Result	Execution time	Memory
35002		long10024070	스파이 (JOI13_spy)	C++11	30 / 100	2000 ms	33500 KiB

spy

#define Link ""

#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>

#define TASK "SPY"

using namespace std;

void OpenFile()
{
    freopen(".INP","r",stdin);
    freopen(".OUT","w",stdout);
}

const int maxn = 2e3 + 1;
int n,m,p[2][maxn],res[maxn],c[2][maxn][maxn],cnt[2][maxn];

int FastIn()
{
    int res = 0;
    register char c = getchar();
    while (c < '0' || '9' < c) c = getchar();
    while ('0' <= c && c <= '9') res = res * 10 + c - '0', c = getchar();
    return res;
}

inline void writeln(int x)
{

    char buffor[21];
    register int i=0;
    int neg=0;
    if (x<0) {
        neg=1;
        x= -x;
    }
    do {
        buffor[i++]=(x%10)+'0';
        x/=10;
    }
    while(x);
    i--;
    if (neg) putchar('-');
    while(i>=0) putchar(buffor[i--]);
    putchar('\n');
}

void Enter()
{
    n = FastIn();
    m = FastIn();
    for (int i=1;i<=n;++i) {
        p[0][i] = FastIn();
        p[1][i] = FastIn();
    }
}

void DFS(int t, int i, int u)
{
    if (u == 0)
        return;
    c[t][u][cnt[t][u]++] = i;
    DFS(t,i,p[t][u]);
}

void Init()
{
    for (int i=1;i<=n;++i) {
        DFS(0,i,i);
        DFS(1,i,i);
    }
    for (int i=1;i<=n;++i) {
        sort(c[0][i],c[0][i]+cnt[0][i]);
        sort(c[1][i],c[1][i]+cnt[1][i]);
    }
}

void Solve()
{
    for (;m>0;--m) {
        int R,S;
        R = FastIn();
        S = FastIn();
        int i = 0;
        int j = 0;
        while (c[0][R][i] != 0 && c[1][S][j] != 0)
            if (c[0][R][i] == c[1][S][j]) {
                ++res[c[1][S][j]];
                ++i;
                ++j;
            }
            else
                if (c[0][R][i] < c[1][S][j])
                    ++i;
                else
                    ++j;
    }
    for (int i=1;i<=n;++i)
        writeln(res[i]);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    //OpenFile();

    Enter();
    Init();
    Solve();
}

Compilation message (stderr)

spy.cpp: In function 'void OpenFile()':
spy.cpp:14:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(".INP","r",stdin);
                              ^
spy.cpp:15:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(".OUT","w",stdout);
                               ^

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 70