Submission #133451

#	Time	Username	Problem	Language	Result	Execution time	Memory
133451		duality	Bitaro’s Party (JOI18_bitaro)	C++11	100 / 100	1854 ms	241872 KiB

bitaro

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long int LLI;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vpii;

vi adjList[100000],C;
vpii best[100000];
int del[100000];
int dp[100000];
int main() {
    int i,j,k;
    int N,M,Q;
    int S,E,T,Y;
    scanf("%d %d %d",&N,&M,&Q);
    for (i = 0; i < M; i++) scanf("%d %d",&S,&E),adjList[E-1].pb(S-1);
    for (i = 0; i < N; i++) {
        best[i].pb(mp(0,i));
        for (j = 0; j < adjList[i].size(); j++) {
            int v = adjList[i][j];
            for (k = 0; k < best[v].size(); k++) best[i].pb(mp(best[v][k].first+1,best[v][k].second));
        }
        int c = 0;
        sort(best[i].begin(),best[i].end(),greater<pii>());
        for (j = 0; j < best[i].size(); j++) {
            if (!del[best[i][j].second]) best[i][c++] = best[i][j],del[best[i][j].second] = 1;
        }
        for (j = 0; j < c; j++) del[best[i][j].second] = 0;
        best[i].resize(min(100,c));
    }
    for (i = 0; i < Q; i++) {
        scanf("%d %d",&T,&Y),T--;
        C.resize(Y);
        for (j = 0; j < Y; j++) scanf("%d",&C[j]),C[j]--,del[C[j]] = 1;
        for (j = 0; j < best[T].size(); j++) {
            if (!del[best[T][j].second]) break;
        }
        if (j < best[T].size()) printf("%d\n",best[T][j].first);
        else {
            for (j = 0; j <= T; j++) {
                dp[j] = del[j] ? -1e9:0;
                for (k = 0; k < adjList[j].size(); k++) dp[j] = max(dp[j],dp[adjList[j][k]]+1);
            }
            printf("%d\n",(dp[T] < 0) ? -1:dp[T]);
        }
        for (j = 0; j < Y; j++) del[C[j]] = 0;
    }

    return 0;
}

Compilation message (stderr)

bitaro.cpp: In function 'int main()':
bitaro.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < adjList[i].size(); j++) {
                     ~~^~~~~~~~~~~~~~~~~~~
bitaro.cpp:24:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (k = 0; k < best[v].size(); k++) best[i].pb(mp(best[v][k].first+1,best[v][k].second));
                         ~~^~~~~~~~~~~~~~~~
bitaro.cpp:28:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < best[i].size(); j++) {
                     ~~^~~~~~~~~~~~~~~~
bitaro.cpp:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (j = 0; j < best[T].size(); j++) {
                     ~~^~~~~~~~~~~~~~~~
bitaro.cpp:41:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (j < best[T].size()) printf("%d\n",best[T][j].first);
             ~~^~~~~~~~~~~~~~~~
bitaro.cpp:45:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 for (k = 0; k < adjList[j].size(); k++) dp[j] = max(dp[j],dp[adjList[j][k]]+1);
                             ~~^~~~~~~~~~~~~~~~~~~
bitaro.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d",&N,&M,&Q);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~
bitaro.cpp:19:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (i = 0; i < M; i++) scanf("%d %d",&S,&E),adjList[E-1].pb(S-1);
                             ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
bitaro.cpp:35:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d",&T,&Y),T--;
         ~~~~~~~~~~~~~~~~~~~~^~~~
bitaro.cpp:37:57: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         for (j = 0; j < Y; j++) scanf("%d",&C[j]),C[j]--,del[C[j]] = 1;
                                 ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 86 / 86