Submission #403574

#	Time	Username	Problem	Language	Result	Execution time	Memory
403574		tqbfjotld	조개 줍기 (KOI17_shell)	C++14	46 / 100	1033 ms	103752 KiB

shell

#include <bits/stdc++.h>
using namespace std;
#define int long long

int vals[1505][1505];
int val2[1505][1505];
int num[1505][1505];

vector<pair<int,int> > vis;
bool vis2[1505][1505];
int curans = 0;
int n;

void decr(int x, int y){
    if (vis2[x][y]) return;
    vis.push_back({x,y});
    vis2[x][y] = true;
    val2[x][y]--;
    curans--;
    if (x!=n){
        if (vals[x+1][y]+max(val2[x][y],y!=1?val2[x+1][y-1]:0)<val2[x+1][y]){
            decr(x+1,y);
        }
    }
    if (y!=n){
        if (vals[x][y+1]+max(val2[x][y],x!=1?val2[x-1][y+1]:0)<val2[x][y+1]){
            decr(x,y+1);
        }
    }
}

main(){
    scanf("%lld",&n);
    if (n<=100){
        for (int x = 0; x<n; x++){
            for (int y = 0; y<n; y++){
                scanf("%lld",&vals[x][y]);
            }
        }
        for (int x = 0; x<n; x++){
            for (int y = 0; y<n; y++){
                if (x==0){
                    if (y==0) val2[x][y] = vals[x][y];
                    else val2[x][y] = vals[x][y]+val2[x][y-1];
                }
                else if (y==0){
                    val2[x][y] = vals[x][y]+val2[x-1][y];
                }
                else{
                    val2[x][y] = vals[x][y]+max(val2[x-1][y],val2[x][y-1]);
                }
            }
        }

        for (int x = 0; x<n; x++){
            for (int y = 0; y<n; y++){
                curans += val2[x][y];
            }
        }
        printf("%lld\n",curans);
        for (int x = 0; x<n; x++){
            char c;
            int a,b;
            scanf(" %c%lld%lld",&c,&a,&b);
            if (c=='U'){
                vals[a-1][b-1]++;
            }
            else{
                vals[a-1][b-1]--;
            }
            for (int x = 0; x<n; x++){
                for (int y = 0; y<n; y++){
                    if (x==0){
                        if (y==0) val2[x][y] = vals[x][y];
                        else val2[x][y] = vals[x][y]+val2[x][y-1];
                    }
                    else if (y==0){
                        val2[x][y] = vals[x][y]+val2[x-1][y];
                    }
                    else{
                        val2[x][y] = vals[x][y]+max(val2[x-1][y],val2[x][y-1]);
                    }
                }
            }

            int curans = 0;
            for (int x = 0; x<n; x++){
                for (int y = 0; y<n; y++){
                    curans += val2[x][y];
                }
            }
            printf("%lld\n",curans);
        }
    return 0;
    }
    for (int x = 1; x<=n; x++){
        for (int y = 1; y<=n; y++){
            scanf("%lld",&vals[x][y]);
        }
    }
    for (int x = 1; x<=n; x++){
        for (int y = 1; y<=n; y++){
            if (x==1){
                if (y==1) val2[x][y] = vals[x][y];
                else val2[x][y] = vals[x][y]+val2[x][y-1];
            }
            else if (y==1){
                val2[x][y] = vals[x][y]+val2[x-1][y];
            }
            else{
                val2[x][y] = vals[x][y]+max(val2[x-1][y],val2[x][y-1]);
            }
            curans += val2[x][y];
        }
    }
    printf("%lld\n",curans);
    for(int x = 0; x<n; x++){
        char c;
        int a,b;
        scanf(" %c%lld%lld",&c,&a,&b);
        vals[a][b]--;
        for (auto y : vis){
            vis2[y.first][y.second] = false;
        }
        vis.clear();
        decr(a,b);
        printf("%lld\n",curans);
    }
}

Compilation message (stderr)

shell.cpp:32:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   32 | main(){
      | ^~~~
shell.cpp: In function 'int main()':
shell.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
shell.cpp:37:22: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |                 scanf("%lld",&vals[x][y]);
      |                 ~~~~~^~~~~~~~~~~~~~~~~~~~
shell.cpp:64:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |             scanf(" %c%lld%lld",&c,&a,&b);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
shell.cpp:98:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   98 |             scanf("%lld",&vals[x][y]);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~
shell.cpp:120:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  120 |         scanf(" %c%lld%lld",&c,&a,&b);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 34 / 34
• Subtask 3: 0 / 54