Submission #249189

#	Time	Username	Problem	Language	Result	Execution time	Memory
249189		blacktulip	Shell (info1cup18_shell)	C++17	55 / 100	1097 ms	43384 KiB

shell

#include <bits/stdc++.h>

using namespace std;

typedef long long lo;
typedef pair< lo,lo > PII;

#define fi first
#define se second
#define mp make_pair
#define endl "\n"
#define pb push_back
#define int long long
#define fio() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define FOR for(int i=1;i<=n;i++)
#define mid ((start+end)/2)
#define ort ((bas+son)/2)

const lo inf = 1000000000000000000;
const lo KOK = 100000;
const lo LOG = 30;
const lo li = 500005;
const lo mod = 1000000007;

int n,m,b[li],a[li],k,flag,t,dp[1505][1505],vis[1505][1505];
int cev;
string s;
vector<int> v[li];

inline int add(int x,int y){
	if(x+y>=mod)return x+y-mod;
	return x+y;
}

inline int mul(int x,int y){
	return (x%mod)*(y%mod)%mod;
}

inline int f(int sira,int num){
	int cevv=0;
	if(sira==n){
		if(num<=k)return 0;
		return 1;
	}
	if(~dp[sira][num])return dp[sira][num];
	for(int i=0;i<(int)v[sira].size();i++){
		int go=v[sira][i];
		cevv=add(cevv,mul(f(go,num+(go==a[num]?1:0)),vis[sira][go]));
	}
	return dp[sira][num]=cevv;
}

main(void){
	memset(dp,-1,sizeof(dp));
	scanf("%lld %lld %lld",&n,&m,&k);
	for(int i=1;i<=k;i++){
		scanf("%lld",&a[i]);
	}
	for(int i=1;i<=m;i++){
		int x,y;
		
		scanf("%lld %lld",&x,&y);
		if(vis[x][y]){vis[x][y]++;continue;}
		v[x].pb(y);
		vis[x][y]++;
	}
	printf("%lld\n",f(1,1+(a[1]==1?1:0)));
	return 0;
}

Compilation message (stderr)

shell.cpp:53:10: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(void){
          ^
shell.cpp: In function 'int main()':
shell.cpp:55:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld %lld %lld",&n,&m,&k);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
shell.cpp:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&a[i]);
   ~~~~~^~~~~~~~~~~~~~
shell.cpp:62:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %lld",&x,&y);
   ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 45 / 45
• Subtask 3: 0 / 20
• Subtask 4: 0 / 25