Submission #337312

#	Time	Username	Problem	Language	Result	Execution time	Memory
337312		Giselus	Linear Garden (IOI08_linear_garden)	C++14	100 / 100	47 ms	6368 KiB

linear_garden

#include<cstdio>
#include<algorithm>
#include<iostream>
using namespace std;

int pot[1000007];
int main(void){

int n,m,a,b,c,d,x;
int ma = 0, mi = 0;
string s;
scanf("%d %d",&n,&m);
cin >> s;
pot[0] = 1;
for(int i = 1; i<=n+3;i++){
    pot[i] = pot[i-1] * 2;
    pot[i] %= m;
}
int odp = 0;
int cur = 0;
for(int i =1; i <= n;i++){
    if(s[i-1] == 'L'){
        cur++;
        ma = max(ma,cur);
    }else{
        cur--;

        if(cur == -2){
            if(mi == -2){
                odp += pot[(n-i)/2];
            }else{
                odp += pot[(n-i)/2];
                odp += pot[(n-i+1)/2]-1;
            }
        }
        if(cur == -1 && mi == -1){
            odp += pot[(n-i)/2];
        }
        if(cur == -1 && mi == 0){
            odp += pot[(n-i)/2];
            odp += pot[(n-i+1)/2]-1;
        }
        if(cur == 0 && mi == 0){
            odp += pot[(n-i)/2];
        }
        mi = min(mi,cur);
        //printf("%d %d\n",i,odp);
        odp %= m;

    }
}

odp++;
odp %= m;
printf("%d",odp);



return 0;
}

Compilation message (stderr)

linear_garden.cpp: In function 'int main()':
linear_garden.cpp:9:9: warning: unused variable 'a' [-Wunused-variable]
    9 | int n,m,a,b,c,d,x;
      |         ^
linear_garden.cpp:9:11: warning: unused variable 'b' [-Wunused-variable]
    9 | int n,m,a,b,c,d,x;
      |           ^
linear_garden.cpp:9:13: warning: unused variable 'c' [-Wunused-variable]
    9 | int n,m,a,b,c,d,x;
      |             ^
linear_garden.cpp:9:15: warning: unused variable 'd' [-Wunused-variable]
    9 | int n,m,a,b,c,d,x;
      |               ^
linear_garden.cpp:9:17: warning: unused variable 'x' [-Wunused-variable]
    9 | int n,m,a,b,c,d,x;
      |                 ^
linear_garden.cpp:12:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 | scanf("%d %d",&n,&m);
      | ~~~~~^~~~~~~~~~~~~~~

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