Submission #76113

#	Time	Username	Problem	Language	Result	Execution time	Memory
76113		cubecube1000	스파이 (JOI13_spy)	C++14	100 / 100	576 ms	83388 KiB

spy

#include<bits/stdc++.h>
#define x first
#define y second
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll, ll> pll;
const ll MAX=2005;
const ll INFint=0x3f3f3f3f;
const ll INFLL=0x3f3f3f3f3f3f3f;
const ll MOD=1e9+7;
int par[2][MAX],cnt[MAX][MAX],sum[MAX][MAX],p1,p2,sum2[MAX][MAX],n,m;
vector<int> conn[2][MAX];
void calc(int x1,int x2,int r){
    r+=cnt[x1][x2];
    sum[x1][x2]=r;
    for(int i=0;i<conn[1][x2].size();i++) calc(x1,conn[1][x2][i],r);
    return;
}
void calc2(int x1,int x2,int r){
    r+=sum[x1][x2];
    sum2[x1][x2]=r;
    for(int i=0;i<conn[0][x1].size();i++) calc2(conn[0][x1][i],x2,r);
    return;
}
int main(){
    scanf("%d%d",&n,&m);
    for(int i=1;i<=n;i++){
        scanf("%d%d",&par[0][i],&par[1][i]);
        conn[0][par[0][i]].push_back(i),conn[1][par[1][i]].push_back(i);
        if(par[0][i]==0) p1=i;
        if(par[1][i]==0) p2=i;
    }
    for(int i=0;i<m;i++){
        int t1,t2;
        scanf("%d%d",&t1,&t2);
        cnt[t1][t2]++;
    }
    for(int i=1;i<=n;i++) calc(i,p2,0);
    for(int i=1;i<=n;i++) calc2(p1,i,0);
    for(int i=1;i<=n;i++){
        printf("%d\n",sum2[i][i]);
    }
}

Compilation message (stderr)

spy.cpp: In function 'void calc(int, int, int)':
spy.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<conn[1][x2].size();i++) calc(x1,conn[1][x2][i],r);
                 ~^~~~~~~~~~~~~~~~~~~
spy.cpp: In function 'void calc2(int, int, int)':
spy.cpp:23:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<conn[0][x1].size();i++) calc2(conn[0][x1][i],x2,r);
                 ~^~~~~~~~~~~~~~~~~~~
spy.cpp: In function 'int main()':
spy.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~
spy.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&par[0][i],&par[1][i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
spy.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&t1,&t2);
         ~~~~~^~~~~~~~~~~~~~~~

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